Question

For f (x) - 4x +1 and g(x) = ? -5, find (fºg)(4).

Answer 1

$(f\circ g)(x)=f(g(x))=4(x^2-5)+1=4x^2-19$

$(f\circ g)(4)=4\cdot4^2-19=64-19=\boxed{45}$

Hope this helps.