What is the integral from 2 to 6 of 3x ?

The integral from 2 to 6 of 3x is 48

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integral from 2 to 6 of 3x

\int_{2}^{6} 3 x d x

48

Solution steps

\int_{2}^{6} 3 x d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 3 \cdot \int_{2}^{6} x d x

Apply the Power Rule

: [\frac{x ^{2}}{2}]_{2}^{6}

= 3 [\frac{x ^{2}}{2}]_{2}^{6}

Compute the boundaries:

16

= 3 \cdot 16

Simplify

= 48

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