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MATH SOLVE
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If f(x) = 5x, what is f–1(x)? A. f–1(x) = –5x B. f-1(x)=-1/5x C. f-1(x)=1/5x D. f–1(x) = 5x
4 months ago
Q:
If f(x) = 5x, what is f–1(x)? A. f–1(x) = –5x B. f-1(x)=-1/5x C. f-1(x)=1/5x D. f–1(x) = 5x
Accepted Solution
A:
To get the inverse of a function interchange
the x's with the y'x and solve for y, as follows:
y=5x-7
Interchange to get:
x=5y-7
Solve for y to get:
y=(1/5)x+(7/5) so I think it might be c