please tell tomorrow is my exam
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x = 2 + √3
So,
1/x = 1/(2+√3)
By rationalisation we get
1/x = 2 - √3
So,
( x - 1/x )³ = ( 2 + √3 - 2 + √ 3 )³
= (2√3)³
= 8√3³
= 8√27
= 24√3.
Hope this may help you..
So,
1/x = 1/(2+√3)
By rationalisation we get
1/x = 2 - √3
So,
( x - 1/x )³ = ( 2 + √3 - 2 + √ 3 )³
= (2√3)³
= 8√3³
= 8√27
= 24√3.
Hope this may help you..
DRAGONITR:
isn't it is like this that. (2+√3-2-√3). because 1/x=2-√3
??
No because sign of √3 also change
how?
- ( 2 - √3 ) = -2 +√3
thanks a lot
its ok
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