Average Value of a Function

Question

Which of the following expressions gives the average value of the function $$f(x)=3x^3-2x+1$$ on the interval $$[-1,1]$$?

Accepted Answer

$$\frac{1}{2}*\int_{-1}^{1}(3*x^3-2*x+1)\,dx$$

Answer

$$\frac{1}{1}*\int_{-1}^{1}(3*x^3-2*x+1)\,dx$$

Answer

$$\frac{1}{2}*\int_{-1}^{1}(3*x^3-2*x)\,dx$$

Answer

$$\int_{-1}^{1}(3*x^3-2*x+1)\,dx$$

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