Question

if a+1/a=7,find the value o
f a³+1/a³​

Answer 1

${a}^{3} + \frac{1}{ {a}^{3} } \\ {(a + \frac{1}{a} )}^{3} - 3a \times \frac{1}{a} (a + \frac{1}{a} ) \\ {(7)}^{3} - 3(7) \\ 343 - 21 \\ 322$