Question

if (a+1/a)²=7, find 2a³+2/a³​

Answer 1

a+1/a=4. => (a+1/a)³=(4)². => a³+1/a³+3*4=64. => a³+1/a²=52. => 2(a³+1/a³)= 2*52. => 2a³+2/a³=104. Hence, answer is 104 ...

Answer 2

Answer:

dear your answer is 12

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Step-by-step explanation:

let a be 2 {the first prime number)

a+1 = 3 / a = 3/3 exponent 2

3×3 is 6

3×3 is 6

6/6 is rational so = 7

2a exponent 3 + 2/a 3

let a be 2

2 x 2 x 2 = 6

2 x 2 x 2 = 6

6+6 = 12