JEE Main & Advanced Mathematics Definite Integration Question Bank Self Evaluation Test - Application of Integrals

  • question_answer
    Area bounded by the curves \[y={{e}^{x}},y={{e}^{-x}}\] and the straight line \[x=1\] is (in sq. units)

    A) \[e+\frac{1}{e}\]

    B) \[e+\frac{1}{e}+2\]

    C) \[e+\frac{1}{e}-2\]

    D) \[e-\frac{1}{e}+2\]

    Correct Answer: C

    Solution :

    [c] Given curves are \[y={{e}^{x}}\] and \[y={{e}^{-x}}\] Now, \[{{e}^{x}}={{e}^{-x}}\Rightarrow x=0\] \[\therefore \]Area \[=A=\int\limits_{0}^{1}{\left( {{e}^{x}}-{{e}^{-x}} \right)dx=\left( {{e}^{x}}+{{e}^{-x}} \right)_{0}^{1}}\] \[=\left[ \left( e+{{e}^{-1}} \right)-\left( {{e}^{0}}+{{e}^{-0}} \right) \right]=e+\frac{1}{e}-2\].


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