Question

Which of the following expressions is a polynomial?

A. f(x)= -3x^4+8x^2-2√x+1

B. f(x)=4x^3-13x^2+5^x

C. f(x)=5x^3+7x^4-(1)/(2)x

D. f(x)=(4)/(x)-11x^2

Answer 1

A polynomial has only whole numbers as powers of x!
option a) has a sqrt x , that's power of 1/2, so it isn't not a polynomial
Can you check the other options?

Answer 2

B is not because it has 5^x as one

Answer 3

I think C is one

Answer 4

you're right

Answer 5

D isnt one either because you have 4/x that's 4x^-1