જો $f(t) = \int_{-t}^{t} \frac{dx}{1 + x^2}$ હોય,તો $f'(1)$ શું થાય?

  • A
    $0$
  • B
    $2/3$
  • C
    $-1$
  • D
    $1$

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ધારો કે $f: R \rightarrow R$ એ $f(x)=e^{-x} \sin x$ તરીકે વ્યાખ્યાયિત છે. જો $F :[0,1] \rightarrow R$ એ વિકલનીય વિધેય છે જેથી $F(x)=\int_{0}^{x} f(t) dt$ થાય,તો $\int_{0}^{1}(F'(x)+f(x)) e^{x} dx$ નું મૂલ્ય કયા અંતરાલમાં આવે છે?

$\int_2^5 (\sqrt{x+2 \sqrt{x-1}} + \sqrt{x-2 \sqrt{x-1}}) dx = $ ($/3$ માં)

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