Question

If x + 1/x= 7, then find the value of x³+ 1/x³​

Answer 1

Answer:

the answer is 340

Step-by-step explanation:

if X+1/X =7

then

(x+1/x)³=x³+1/x³+3(x+1/x)

(7)³=x³+1/x³+3(7)

361=x³+1/x³+21

361-21=x³+1/x³

340=x³+1/x³

x³+1/x³=340