Let f(x) = 2x - 6. Solve f-1(x) when x = 2.

Algebra
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Let f(x) = 2x - 6. Solve f-1(x) when x = 2.

A) -5
B) 4
C) -2
D) 7

Nov 26th, 2014

f(x) = 2x - 6
so, f-1(x) = (x+6)/2
when x =2 , f-1(2) = (2+6)/2 = 8/2 = 4

Answer : (B)

Nov 26th, 2014

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