If f(x) = 6 − 7x, find f −1(−15).

Algebra
Tutor: None Selected Time limit: 1 Day

If 
f(x) = 6 − 7x,
 find 
f−1(−15).
Feb 28th, 2015

answer:

since the function f(x) is a bijective function in its domain, then I can write:

6-7x = -15, then 7x= 6+15 =21

and x = 3

so I get:

f^(-1) (-15) = 3

Feb 28th, 2015

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