if x+1/x =7 then find x cube + 1/x cubw

Asked by nilayraj07 | 7th Feb, 2021, 07:55: PM

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 | 8th Feb, 2021, 07:37: PM