Question

If f(x) = 3x^2 and g(x) = sqrt(2x), what is the value of (f o g)(8)?

Answer 1

If f(x) = 3x-4 and g(x) = x², find the value of f(3) - g(2)

Given f(x) = 3x-4

Then value of f at x=3 ⇒ f(3) = 3(3) -4 = 9-4 = 5

And Given g(x) = x²

Then value of g at x=2 ⇒ g(2) = (2)² = 4

The value f(3) - g(2) = 5 - 4 = 1

Therefore, the value of f(3) - g(2) is 1.