Question

find the inverse of f(x)=3-5x

Answer 1

first we can actually substitute f(x) by y, thus
f(x) = 3 - 5x
y = 3 - 5x
to get the inverse, interchange the x and y variables,, thus
x = 3 - 5y
now, we solve for y:
x = 3 - 5y
x - 3 = -5y
y = -(x-3)/5
then we substitute back f(x) to y, but this time since we get its inverse, we write f'(x):
f'(x) = -(x-3)/5

hope this helps~ :)

Answer 2

Thank you very much..it helped a lot!!