Answer:
If you actually meant f(x)=2x+3x−1 ,
then note it can be rewritten as:
f(x)=2x−2+5x−1=2+5x−1=y
At this point you can find x in terms of y (“make x the subject”):
y−2=5x−1⟹1y−2=x−15
⟹x=5y−2+1=y+3y−2
Switch variables back to x, and you have the inverse function of f:
g(x)=x+3x−2
How do you know you’ve calculated correctly? The composition of f with g should result in x — that is, evaluate f(g) and you should get the result x:
Annual interest
50000 * (9.5 / 100)
4750
Interest for 12 months = 4750
Interest for 8 months
(4750/12) * 8
$ 3166.67
3x - 1 = 3x -1 because it's reflecting itself
W + 4 > -12
Subtract 4 from both sides
w = -16
