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alena720
@alena720
August 2022
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Помогите.....
дана функция f(x)=2x-3.Найдите значение х при которых 1) f(x)=12
2)f(x)=-1 3)f(x)=0 4)f(x)=2a-1
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anna2501v
Verified answer
F(x)=2x-3
1) f(x)=12
2x-3=12
2х=12+3
2х=15
х=15:2
х=7,5
2) f(x)=-1
2x-3=-1
2x=-1+3
2x=2
x=2:2
x=1
3) f(x)=0
2x-3=0
2x=3
x=3:2
x=1,5
4) f(x)=2a-1
2x-3=2a-1
2x=2a-1+3
2x=2a+2
x=(2a+2)/2
x=a+1
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Answers & Comments
Verified answer
F(x)=2x-31) f(x)=12
2x-3=12
2х=12+3
2х=15
х=15:2
х=7,5
2) f(x)=-1
2x-3=-1
2x=-1+3
2x=2
x=2:2
x=1
3) f(x)=0
2x-3=0
2x=3
x=3:2
x=1,5
4) f(x)=2a-1
2x-3=2a-1
2x=2a-1+3
2x=2a+2
x=(2a+2)/2
x=a+1