Question

(a+1/a)2=3, a3+1/a3=?​

Answer 1

answer is 9/2 ... .....

.....

Answer 2

${(a + \frac{1}{a} )}^{2} = 3 \\ a + \frac{1}{a} = \sqrt{3} \\ {a}^{3} + \frac{1}{ {a}^{3} } \\ {( a + \frac{1}{a} )}^{3} - 3a \frac{1}{a} (a + \frac{1}{a} ) \\ { (\sqrt{3} )}^{3} - 3 \sqrt{3} \\ 3 \sqrt{3} - 3 \sqrt{3} = 0$