If f(x) = 5 - 2x, then f -1(-3) = ?
Select
A) 1	B) 8	C) 6	D) 4	E) 3
Find f -1(x) and then Find f -1(- 3)   y = 5 - 2x , given   x = 5 - 2y , interchange x and y   2y = 5 - x , y = log2(5 - x) , solve for y   f -1(x) = log2(5 - x) , inverse function   f -1(- 3) = log2(5 + 3)   = log2(23) = 3   correct answer 3
<result>E</result>
If f(x) = 5 - 2x, then f -1(-3) = ?