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  • Please solve RD Sharma class 12 chapter 19 Definite Integrals exercise Very short answer type question 26 maths textbook solution

Please solve RD Sharma class 12 chapter 19 Definite Integrals exercise Very short answer type question 26 maths textbook solution

Answers (1)

best_answer

Answer: \frac{1}{2}(e-1)

Hint: you must know the rule of integration for function of x

Given: \int_{0}^{1} x e^{x^{2}} d x

Solution:  

Put

        \begin{aligned} &x^{2}=t \\\\ &2 x d x=d t \\\\ &x d x=\frac{d t}{2} \end{aligned}

                \begin{aligned} &=\frac{1}{2} \int_{0}^{1} e^{t} d t \\\\ &=\frac{1}{2}\left[e^{t}\right]_{0}^{1} \end{aligned}

                \begin{aligned} &=\frac{1}{2}\left[e^{x^{2}}\right]_{0}^{1} \\\\ &=\frac{1}{2}\left[e^{1}-e^{0}\right] \\\\ &=\frac{1}{2}[e-1] \end{aligned}

 

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