little68941
08.10.2020 •
Mathematics
1/2a=1/4a+2
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Ответ:
a=-1
Step-by-step explanation:
1/2a=1/4a+2
by cross multiplying,
2a=4a+2
2a-4a=2
-2a=2
a=2/-2
a=-1
hope you understood :)
Ответ:
h=2
r=5
V=2pi5^2
V=2pi25
V=50pi
V=50*3.14
V=157
answer is first one