Let f (x) = 5x and g(x) = x2 + 1 , for x ∈ . (a) Find f-1(x) . (b) Find ( f ° g) (7) .
a,y=5xfinding the inverse: x=5y - dividing by 5 (1/5)x=y f-1(x)=(1/5)x
b,5x(72+1)=250
Related Maths IB answers
All answers ▸f(x)=sin(2x) for 0<x<pi, find the values of x for which f is a decreasing function
When do you use 'n choose k' and where does the formula come from?
Let (x + 3) be a factor of the polynomial P(x) = x^3 + ax^2 - 7x + 6. Find a and the other two factors.
The function f has a local extreme at point (1,4). If f''(x)=3x^2+2x, then find f(0)?