The value of integral $\mathop \smallint \limits_{ - 2}^4 \,\,x\,\,\left[ x \right]\,\,dx$, is

${\rm{41}}\,\,{\rm{/}}\,{\rm{2}}$

${\rm{21}}\,\,{\rm{/}}\,{\rm{2}}$

JEE MATHEMATICS MCQ: DEFINITE INTEGRATION

1 Easy

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Application +4 | -1

The value of integral

\int \limits_{ - 2}^4 \,\,x\,\,\left[ x \right]\,\,dx

, is

View answer and explanation

Correct option: A

\mathrm{41}\,\,\mathrm{/}\,\mathrm{2}

Option A (41/2) is correct because the integral is evaluated by splitting it into intervals where the greatest integer function is constant, and then summing the results.

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\int \nolimits_0^\infty \,\,\log \,\,\left( {x + \frac{1}{x}} \right)\,\,\frac{{dx}}{{1 + {x^2}}}

is equal to If

f\left( x \right)

is differentiable and

\int \nolimits_0^{{t^2}} \,\,x\;\,f\left( x \right)\,\,dx = \frac{2}{5}\,\,{t^5}

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equals The value of

\int\limits_{{0}}^{11}[x]^{3} . \mathrm{dx}

, where

[*]

denotes the greatest integer function, is The integral

\int\limits_{2}^4 \frac{\log x^2}{\log x^2+\log \left(36-12 x+x^2\right)} d x

is equal to: The definite integral

\int\limits_{{-2}}^0\left(x^3+3 x^2+3 x+3+(x+1) \cos (x+1)\right) d x

equals If

I\,\,\left( {m,\,\,n} \right) = \int \nolimits_0^1 \,\,{t^m}\,\,{\left( {1 + t} \right)^n}\,\,dt

,then the expression for

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