Answers

2014-06-15T14:10:48+08:00
For a, substitute x in the formula with a.
so f(a) = 3a - 2
Bring -2 to the other side:
2 = 3a
a = 2/3

For b, subsitute x with (x+1).
so f(x+1) = 3(x+1) - 2
Get rid of parentheses by calculating.
= 3x +3 - 2
= 3x +1
-1 = 3x
f(x+1) = -1/3
1 4 1