Question

if x+ 1/x =7,then find the valueof x square3 +1/x sqaure 3
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Answer 1

Answer:

322

Step-by-step explanation:

x + 1/x = 7

then we have to find only x^3 + 1 / x^3

( x + 1/x )^3 = 7 ^3

solve this by using (a+b) ^ 3 = a^3 + b^3 + 3ab (a+b)

and use x + 1/x = 7 and you will get 322 on solving.