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  • Provide solution for RD Sharma maths class 12 chapter 19 Definite Integrals exercise Very short answer type question 10

Provide solution for RD Sharma maths class 12 chapter 19 Definite Integrals exercise Very short answer type question 10

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Answer: 1

Hint: You must know the integration rules of trigonometric function with its limits


Given: \int_{0}^{\infty} e^{-x} d x

Solution:  \left[\frac{e^{-x}}{-1}\right]_{0}^{\infty}

\begin{aligned} &=-\left[\frac{1}{e^{\infty}}-\frac{1}{e^{0}}\right] \\\\ &=0+1 \\\\ &=1 \end{aligned}

 

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