Question

if a+1/a=8 then find a^3+1/a^3=?​

Answer 1

Answer:

488

Step-by-step explanation:

By using the formula of (a+b) ^3 we get

(a+1/a)^3 = a^3+1/a^3 +3(a×1/a) (a+1/a)

(8)^3 = a^3+1/a^3 + 3 (8)

a^3+1/a^3= 512- 24

a^3+1/a^3= 488

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