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ICSE Class 9 Answered

If(x+1/x)whole  square=3,find x cube+1/x cube
Asked by Aryan | 02 Jul, 2017, 07:30: PM
answered-by-expert Expert Answer
begin mathsize 16px style open parentheses straight x plus 1 over straight x close parentheses squared equals 3 rightwards double arrow straight x squared plus 1 over straight x squared plus 2 equals 3 rightwards double arrow straight x squared plus 1 over straight x squared minus 1 equals 0 space space space.... left parenthesis straight i right parenthesis Consider comma straight x cubed plus 1 over straight x cubed equals open parentheses straight x plus 1 over straight x close parentheses open parentheses straight x squared minus 1 plus 1 over straight x squared close parentheses space space space space space space space space space space space space space equals open parentheses straight x plus 1 over straight x close parentheses open parentheses 0 close parentheses space space space.... left parenthesis from space left parenthesis straight i right parenthesis right parenthesis space space space space space space space space space space space space space equals 0 end style
Answered by Rebecca | 02 Jul, 2017, 11:09: PM

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