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If a + 1/a = 1 , then a^3 + 1 = ? |
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Answer» Step-by-step EXPLANATION: a+1/a=1....given a=1-1/a a=1a-1/a Taking cube of both sides a^3=1a^3-3a^2+3a-1/a^3 Therefore a^3+1=1a^3-3a^2+3a-1/a^3+1 a^3+1 =1a^3-3a^2+3a-1+1a^3/a^3 a^3+1=2a^3-3a^2+3a-1/a^3 |
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