Question

x+1/x=7, find the value of x³+1/x³​

Answer 1

Answer:

Right answer is 1

x+1/x=7

x³+1/x³

7³+1/7³

343+1/343

1 (343 and 343 cancelled by each other)

Hope it will help you!!

Answer 2

Answer:

322

Step-by-step explanation:

X+1/X = 7

TAKING CUBE ON BOTH SIDE,

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

X^3 + 1/X^3 + 3 x X 1/x ( x+ 1/x) = 343

x^3 + 1/x^3 + 3 X 7 = 343

x^3 + 1/x ^3 = 343 - 21

x^3 + 1/x^3 = 322