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if x plus 1by x is 7then xcube plus 1by x cube is equal to

Posted by Kiran Yadav 7 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Diksha Y 7 years, 2 months ago

x+1/x=7 ( taking cube on both sides) then (x+1/x )cube=7cube ,xcube+1/xcube+3 (x+1/x)=343 then we get xcube +1/x cube= 343-21so we get xcube +1/xcube=322

1Thank You

Tanishk Yadav 7 years, 2 months ago

217/36

1Thank You

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CBSE > Class 10 > Mathematics