Integration At Its Best

Calculus Level 5

( 0 1 x 2 d x 1 x 4 ) ( 0 1 d x 1 + x 4 ) \displaystyle \left( \int _{ 0 }^{ 1 }{ \dfrac { { x }^{ 2 }\cdot dx }{ \sqrt { 1-{ x }^{ 4 } } } } \right) \cdot \left( \int _{ 0 }^{ 1 }{ \dfrac { dx }{ \sqrt { 1+{ x }^{ 4 } } } } \right)

The value of the expression above can be expressed in the form of π β γ . \dfrac { \pi }{ \beta \sqrt { \gamma } } . Find β γ . { \beta }^{ \gamma }.


The answer is 16.

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1 solution

Jaber Al-arbash
Jan 2, 2015

Can u please explain how u got integral 0 to 1 of 1/(1+x^4 )^(1/2) That is how did ur +x become -x.I would be very grateful. i knew first integral from beta fcn but could not do 2nd

incredible mind - 6 years, 5 months ago

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Substitute x = t a n t x=\sqrt{tant} for the second.Then you will get a function of s i n 2 t sin2t ...Then again,substitute s i n 2 t = z sin2t=z and expressing the function in terms of z z ,you will get a beta integral.

Souryajit Roy - 6 years, 5 months ago

can you please tell me how did u your beta func. to integrate first integral i dont know how to apply it much.

Somesh Patil - 5 years, 8 months ago

It becomes easy if u know gamma function

Saarthak Marathe - 5 years, 3 months ago

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