What is the integral from-1 to 1 of (x+3sqrt(1-x^2)) ?

The integral from-1 to 1 of (x+3sqrt(1-x^2)) is (3pi)/2

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integral from-1 to 1 of (x+3sqrt(1-x^2))

\int_{- 1}^{1} (x + 3 1 - x^{2}) d x

\frac{3 π}{2}

Decimal

4.71238 \dots

Solution steps

\int_{- 1}^{1} x + 3 1 - x^{2} d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int_{- 1}^{1} x d x + \int_{- 1}^{1} 3 1 - x^{2} d x

\int_{- 1}^{1} x d x = 0

\int_{- 1}^{1} 3 1 - x^{2} d x = \frac{3 π}{2}

= 0 + \frac{3 π}{2}

Simplify

= \frac{3 π}{2}

What is the integral from-1 to 1 of (x+3sqrt(1-x^2)) ?
The integral from-1 to 1 of (x+3sqrt(1-x^2)) is (3pi)/2