Book7.
1)
*.
a)
For*, let*, Isaythat*.
b)
Forif*, *.
c)
Let*, andlet*, let*, let*,
andlet*.
d)
Sincethen*, therefore*.
e)
But*, therefore*.
f)
But*, therefore*.
g)
But*, therefore*.
h)
But*, therefore*.
i)
But*, therefore*,
whichisimpossible.
j)
Therefore*, therefore*.
k)
QED.
2)
Given*, tofind*.
a)
Let*.
b)
Thusitisrequiredtofind*.
c)
If*, *.
d)
Anditismanifestthat*.
e)
Butif*, *.
f)
For*, otherwise*,
whichiscontrarytothehypothesis.
g)
Therefore*.
h)
Nowlet*, let*, andlet*.
i)
Sincethen*, therefore*.
j)
But*, therefore*.
k)
But*, therefore*.
l)
But*, therefore*.
m) Therefore*.
n)
Isaynextthat*.
o)
Forif*, *.
p)
Let*, andlet*.
q)
Nowsince*, while*, *.
r)
But*, therefore*.
s)
But*, therefore*.
t)
But*, therefore*,
whichisimpossible.
u)
Therefore*, therefore*.
v)
QED.
w) Porism. Fromthisitismanifestthatif*, *.
3)
Given*, tofind*.
a)
Let*, thusitisrequiredtofind*.
b)
Forlet*, then*.
c)
Firstlet*.
d)
But*, therefore*, therefore*.
e)
Isaythat*.
f)
Forif*, *.
g)
Letsuch*.
h)
Sincethen*, *, therefore*.
i)
But*, therefore*,
whichisimpossible.
j)
Therefore*, therefore*.
k)
Nextlet*, Isayfirstthat*.
l)
Forsince*, *.
m) Now*.
n)
But*, therefore*, therefore*.
o)
Letthen*.
p)
Thensince*, *, therefore*.
q)
But*, therefore*, therefore*.
r)
Isaynextthat*.
s)
Forif*, *.
t)
Let*.
u)
Nowsince*, *, therefore*.
v)
But*, therefore*.
w) And*, therefore*, therefore*.
x)
But*, therefore*,
whichisimpossible.
y)
Therefore*, therefore*.
4)
*.
a)
Let*, andlet*, Isaythat*.
b)
For*.
c)
Firstlet*.
d)
Thenif*, *, sothat*.
e)
Nextlet*, then*.
f)
Ifnow*.
g)
Butifnot*, let*, andlet*.
h)
Nowsince*, *.
i)
But*, therefore*, sothat*.
j)
Therefore, etc.
k)
QED.
5)
If*, *.
a)
Forlet*, and*, Isaythat*.
b)
Forsince*, therefore*.
c)
Let*, and*, then*.
d)
Andsince*, and*, therefore*.
e)
Forthesamereason*.
f)
Therefore*.
g)
Therefore*.
h)
Therefore*.
i)
QED.
6)
If*, *.
a)
Forlet*, and*, Isaythat*.
b)
Forsince*, *, therefore*.
c)
Let*, and*, thus*.
d)
Andsince*, therefore*.
e)
Forthesamereason*.
f)
Therefore*.
g)
QED.
7)
If*, *.
a)
Forlet*, Isaythat*.
b)
For*,.
c)
Nowsince*, therefore*.
d)
But*, therefore*, therefore*.
e)
Let*, therefore*.
f)
Nowsince*, while*, therefore*.
g)
But*, therefore*.
8)
If*, *.
a)
Forlet*, Isaythat*.
b)
Forlet*.
c)
Therefore*.
d)
Let*, and*, thus*.
e)
Nowsince*, while*, therefore*.
f)
Let*.
g)
Therefore*, therefore*.
h)
Againsince*, while*,
therefore*.
i)
Let*.
j)
Therefore*, therefore*.
k)
But*, therefore*.
l)
But*, and*, therefore*.
m) QED.
9)
If*, *.
a)
Forlet*, Isaythat*.
b)
Forsince*, therefore*.
c)
Let*, and*, thus*.
d)
Nowsince*, and*, while*,
therefore*, sothat*.
e)
But*, therefore*.
f)
QED.
10)
If*, *.
a)
For*, Isaythat*.
b)
Forsince*, therefore*.
c)
Let*, and*, thus*.
d)
Nowsince*, alternatelyalso*.
e)
Forthesamereasonalso*, sothat*.
f)
QED.
11)
If*, *.
a)
As*, solet*, Isaythat*.
b)
Since*, *, therefore*.
c)
Therefore*.
12)
If*, *.
a)
Let*, sothat*, Isaythat*.
b)
Forsince*, *.
c)
Therefore*.
d)
Therefore*.
e)
QED.
13)
If*, *.
a)
Let*, sothat*, Isaythat*.
b)
Forsince*, therefore*.
c)
Therefore*.
d)
Therefore*.
e)
QED.
14)
If*, *.
a)
Let*, sothat*, Isaythat*.
b)
Forsince*,
thereforealternately*.
c)
Againsince*,
thereforealternately*.
d)
But*, thereforealso*.
e)
Thereforealternately*.
f)
QED.
15)
If*, *.
a)
Forlet*, andlet*, Isaythat*.
b)
Forsince*, *, therefore*.
c)
Let*, and*.
d)
Thus*.
e)
Andsince*, and*, while*,
therefore*.
f)
Thereforealso*, therefore*.
g)
But*, and*.
h)
Therefore*.
i)
Therefore*.
j)
QED.
16)
If*, *.
a)
Let*, andlet*, Isaythat*.
b)
Forsince*, therefore*.
c)
But*, therefore*.
d)
Thereforealternately*.
e)
Againsince*, therefore*.
f)
But*, therefore*.
g)
But*, therefore*.
h)
Therefore*.
i)
QED.
17)
If*, *.
a)
Forlet*, Isaythat*.
b)
Forsince*, therefore*.
c)
But*, therefore*.
d)
Therefore*.
e)
Forthesamereason*,
thereforealso*.
f)
Thereforealternately*.
g)
QED.
18)
If*, *.
a)
Forlet*, Isaythat*.
b)
Forsince*, thereforealso*.
c)
Forthesamereasonalso*.
d)
Therefore*.
e)
Therefore*.
f)
QED.
19)
If*, *, andif*, *.
a)
Let*, sothat*, andlet*,
andlet*, Isaythat*.
b)
Forlet*.
c)
Sincethen*, *.
d)
Therefore*.
e)
But*, thereforealso*.
f)
Againsince*, butfurther*.
g)
Therefore*.
h)
Butfurther*, thereforealso*.
i)
Therefore*, therefore*.
j)
Againlet*, Isaythat*.
k)
Forwiththesamereason*,
therefore*.
l)
But*, and*.
m) Thereforealso*.
n)
QED.
20)
*.
a)
Forlet*, Isaythat*.
b)
Now*.
c)
Forifpossiblelet*, therefore*.
d)
Therefore*.
e)
Let*, and*, thus*.
f)
Nowsince*, and*, while*,
therefore*.
g)
Thereforealso*.
h)
Therefore*.
i)
Therefore*, whichisimpossible,
forbyhypothesis*.
j)
Therefore*, therefore*.
k)
And*, therefore*.
l)
QED.
21)
*.
a)
Let*, Isaythat*.
b)
Forifnot*.
c)
Let*.
d)
Sincethen*, therefore*.
e)
Now*.
f)
Therefore*.
g)
Andsince*, therefore*.
h)
Forthesamereason*.
i)
Therefore*, whichisimpossible.
j)
Therefore*.
k)
Therefore*.
l)
QED.
22)
*.
a)
Let*, Isaythat*.
b)
Forif*, *.
c)
Let*, andlet*.
d)
Let*, andlet*.
e)
Since*, therefore*.
f)
Forthesamereason*.
g)
Thus*, therefore*, therefore*,
whichisimpossible.
h)
Therefore*.
i)
Therefore*.
j)
QED.
23)
If*, *.
a)
Let*, andlet*, Isaythat*.
b)
Forif*, *.
c)
Let*, andlet*.
d)
Since*, and*, therefore*.
e)
But*, therefore*,
whichisimpossible.
f)
Therefore*.
g)
Therefore*.
h)
QED.
24)
If*, *.
a)
Forlet*, andlet*, Isaythat*.
b)
Forif*, *.
c)
Let*, andlet*.
d)
Nowsince*, and*, therefore*.
e)
Let*, therefore*.
f)
Therefore*.
g)
Butfurther*, therefore*.
h)
Butif*, *, therefore*.
i)
But*, and*, therefore*.
j)
But*, therefore*,
whichisimpossible.
k)
Therefore*.
l)
Therefore*.
m) QED.
25)
If*, *.
a)
Let*, andlet*, Isaythat*.
b)
Forlet*.
c)
Since*, therefore*.
d)
Therefore*, therefore*.
e)
But*.
f)
Therefore*.
g)
QED.
26)
If*, *.
a)
Forlet*, andlet*, Isaythat*.
b)
Forsince*, therefore*.
c)
But*, therefore*.
d)
Forthesamereason*.
e)
Therefore*.
f)
Therefore*.
g)
But*.
h)
Therefore*.
i)
QED.
27)
If*, *, andif*, *.
a)
Let*, let*, andlet*, Isaythat*.
b)
Forsince*, and*, therefore*.
c)
Sincethen*, and*, therefore*.
d)
Againsince*, and*, therefore*.
e)
Sincethen*, therefore*.
f)
And*.
g)
Therefore*.
h)
QED.
28)
If*, *, andif*, *.
a)
Forlet*, Isaythat*.
b)
Forif*, *.
c)
Let*, andlet*.
d)
Sincethen*, therefore*.
e)
But*, therefore*,
whichisimpossible.
f)
Therefore*, therefore*.
g)
Forthesamereason*.
h)
Therefore*.
i)
Againlet*, Isaythat*.
j)
Forif*, *.
k)
Let*.
l)
Nowsince*, *.
m) But*, therefore*, whichisimpossible.
n)
Therefore*.
o)
Therefore*.
p)
QED.
29)
*.
a)
Let*, Isaythat*.
b)
Forif*, *.
c)
Let*.
d)
Since*, therefore*.
e)
Nowsince*, therefore*,
whichisimpossible.
f)
Therefore*.
g)
Therefore*.
h)
QED.
30)
If*, *.
a)
Forlet*, Isaythat*.
b)
Forlet*.
c)
Now*, therefore*.
d)
And*.
e)
Sincethen*, therefore*.
f)
Further*, therefore*.
g)
Therefore*.
h)
But*, and*, therefore*.
i)
Similarly*.
j)
Therefore*.
k)
QED.
31)
*.
a)
Let*, Isaythat*.
b)
Forsince*, *.
c)
Let*, andlet*.
d)
Nowif*, *.
e)
Let*, andlet*.
f)
Thensince*, *, therefore*.
g)
Andif*, *.
h)
Butif*, *.
i)
Thusif*, *.
j)
Forif*, *, whichisimpossible.
k)
Therefore*.
l)
Therefore*.
m) QED.
32)
*.
a)
Let*, Isaythat*.
b)
Ifnow*, *.
c)
Butif*, *.
d)
Therefore*.
e)
QED.
33)
Given*, tofind*.
a)
Let*, thusitisrequiredtofind*.
b)
*.
c)
Nowif*, *.
d)
Butifnotlet*, and*, let*.
e)
Therefore*.
f)
Therefore*, therefore*.
g)
Isaynextthat*.
h)
Forif*, *.
i)
Let*, therefore*.
j)
Now*, therefore*.
k)
Andsince*, therefore*.
l)
Forthesamereason*.
m) Therefore*.
n)
Nowsince*, therefore*.
o)
Forthesamereason*.
p)
Therefore*.
q)
Therefore*.
r)
But*, therefore*.
s)
And*, whichisimpossible,
forbyhypothesis*.
t)
Therefore*.
u)
Therefore*.
v)
QED.
34)
Given*, tofind*.
a)
Let*, thusitisrequiredtofind*.
b)
Now*.
c)
Firstlet*, andlet*,
thereforealso*.
d)
Therefore*.
e)
Isaynextthat*.
f)
Forifnot*.
g)
Let*.
h)
Then*, and*, therefore*, and*,
therefore*.
i)
Therefore*.
j)
But*, and*, therefore*.
k)
Andsince*, *, therefore*.
l)
But*, therefore*,
whichisimpossible.
m) Therefore*, therefore*.
n)
Nextlet*, andlet*, therefore*.
o)
Andlet*, therefore*,
therefore*.
p)
Isaynextthat*.
q)
Forifnot*.
r)
Let*.
s)
And*, and*.
t)
Therefore*. and*.
u)
Therefore*, therefore*.
v)
But*.
w) Thereforealso*.
x)
But*, and*, therefore*.
y)
Andsince*, therefore*.
z)
But*, therefore*,
whichisimpossible.
aa) Therefore*.
bb)
Therefore*.
cc) QED.
35)
If*, *.
a)
Forlet*, andlet*, Isaythat*.
b)
Forif*, let*.
c)
Nowsince*, and*, therefore*.
d)
But*, therefore*,
whichisimpossible.
e)
Therefore*, therefore*.
f)
QED.
36)
Given*, tofind*.
a)
Let*, thusitisrequiredtofind*.
b)
Let*.
c)
Then*.
d)
Firstlet*.
e)
But*, therefore*.
f)
Isaynextthat*.
g)
Forifnot*.
h)
Let*.
i)
Since*, therefore*.
j)
Therefore*.
k)
But*, therefore*,
whichisimpossible.
l)
Therefore*, therefore*.
m) Againlet*, andlet*.
n)
Since*, and*, therefore*.
o)
But*, thereforealso*.
p)
Isaynextthat*.
q)
Forifnot*.
r)
Let*.
s)
Since*, thereforealso*,
therefore*.
t)
But*, therefore*.
u)
But*, therefore*, sothat*.
v)
But*, therefore*,
whichisimpossible.
w) Therefore*.
x)
Therefore*.
37)
If*, *.
a)
Forlet*, Isaythat*.
b)
For*.
c)
Since*, and*, therefore*.
d)
Thereforealternately*,
therefore*.
e)
But*, therefore*, sothat*.
f)
QED.
38)
If*, *.
a)
Forlet*, andlet*, Isaythat*.
b)
Forsince*, and*, therefore*, therefore*.
c)
Thereforealternately*.
d)
Therefore*.
e)
QED.
39)
Tofind*.
a)
Let*, thusitisrequiredtofind*.
b)
Let*, andlet*.
c)
Therefore*.
d)
But*, therefore*.
e)
Isaynextthat*.
f)
Forifnot*.
g)
Let*.
h)
Since*, therefore*.
i)
But*, therefore*.
j)
And*, whichisimpossible.
k)
Therefore*.
l)
QED.
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