What is the integral from 1 to 2 of 2t*e^{t^2} ?

The integral from 1 to 2 of 2t*e^{t^2} is e^4-e

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integral from 1 to 2 of 2t*e^{t^2}

\int_{1}^{2} 2 t \cdot e^{t^{2}} d t

e^{4} - e

Decimal

51.87986 \dots

Solution steps

\int_{1}^{2} 2 t e^{t^{2}} d t

Take the constant out:

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

= 2 \cdot \int_{1}^{2} t e^{t^{2}} d t

Apply u-substitution

= 2 \cdot \int_{1}^{4} \frac{e ^{u}}{2} d u

Take the constant out:

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

= 2 \cdot \frac{1}{2} \cdot \int_{1}^{4} e^{u} d u

Use the common integral:

\int e^{u} d u = e^{u}

= 2 \cdot \frac{1}{2} [e^{u}]_{1}^{4}

Simplify

2 \cdot \frac{1}{2} [e^{u}]_{1}^{4} : [e^{u}]_{1}^{4}

= [e^{u}]_{1}^{4}

Compute the boundaries:

e^{4} - e

= e^{4} - e

What is the integral from 1 to 2 of 2t*e^{t^2} ?
The integral from 1 to 2 of 2t*e^{t^2} is e^4-e