Let fx
- let fx u003d 2x2+1
- let fx u003d x-1/x+1
- let fx be a differentiable function at xu003da
- let fx be a polynomial of degree 4
- let fx be a function such that f(x+y)
- let fx be a polynomial of degree 3 such that f(-1)u003d10
- let fx be a cubic polynomial
- let fx be a polynomial of degree 6
- let fx be a polynomial of degree 5
- let fx be a polynomial of degree 3 such that f(k)