if (a+1/a)²=3 , show that a³+1/a³=0
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Given (a+1/a) 2 = 3 Therefore (a + 1/a) = √3 Recall the formula, (a3 + b3) = (a + b)3 - 3ab(a + b) Therefore,
(a3 + 1/a3) = (a + 1/a)3 - 3 x a x 1/a (a + 1/a)
= (√3)3 - 3(√3) = 3√3 - 3(√3 = 0
hence proved ....
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which class's ques is this?
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