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If x+1/3=3 then find x^3+1/ x^3 |
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Answer» Answer: Step-by-step explanation: It is GIVEN that x+1x=3 Taking CUBES on both sides, (x+1x)3=33 Since, (a+b)3=a3+3a2b+3ab2+b3 Therefore, x3+3x2x+3xx2+1x3=27 x3+3x+3x+1x3=27 x3+1x3+3(x+1x)=27 x3+1x3+3(3)=27 x3+1x3+9=27 x3+1x3=27−9 x3+1x3=18 Hope that HELPS! |
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