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CBSE Class 9 Answered

if x+1/x =7 then find x cube + 1/x cubw
Asked by nilayraj07 | 07 Feb, 2021, 07:55: PM
answered-by-expert Expert Answer
begin mathsize 16px style open parentheses straight x plus 1 over straight x close parentheses cubed equals space straight x cubed space plus space 1 over straight x cubed plus space 3 open parentheses straight x plus 1 over straight x close parentheses rightwards double arrow 7 cubed equals space straight x cubed space plus space 1 over straight x cubed plus space 3 cross times 7 rightwards double arrow space straight x cubed space plus space 1 over straight x cubed space equals space 343 space minus space 21 space equals space 322 end style
Answered by Yasmeen Khan | 08 Feb, 2021, 07:37: PM

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