Find a symbolic representation

Question

f^-1(x) given f(x)=7x-4

Answer 1

April, the inverse function f^-1(x) is the function we get by solving for x in the original equation

Since f(x) = y = 7x - 4

=> x = (y + 4 ) /7

Now just replace y on the right by x and we have f^-1(x)

So, f^-1(x) = (x + 4 ) / 7

That's all!