Math, asked by vishalkumar7209, 1 year ago

please solve please please please please please please

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Answered by spiderman2019

2

Answer:

110

Step-by-step explanation:

a + 1/a = 5

Cubing on both sides

(a + 1/a)³ = 5³

//using (a+b)³ = a³ + b³+ 3ab(a+b)

a³ + 1/a³ + 3(a)(1/a)(a+1/a) = 125

a³ + 1/a³ +3 (a+1/a) = 125

a³ + 1/a³ + 3 * 5 = 125

a³ + 1/a³ = 125 - 15 = 110.

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