x=2^1/2 + 1 then (x + 1/x )(x - 1/x) =?
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x = 2^1/2 + 1
= 2/3
( x + 1/x ) ( X - 1/x )
= x^2 - 1/ x^2.
= ( 2/3 )^2 - 1/ ( 2/3 )^2
= 4/9 - 9/4
= 16 - 81 / 36
= -65 /36
= 2/3
( x + 1/x ) ( X - 1/x )
= x^2 - 1/ x^2.
= ( 2/3 )^2 - 1/ ( 2/3 )^2
= 4/9 - 9/4
= 16 - 81 / 36
= -65 /36
bheemanianurag:
thanq
no need to say thanks
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