Question

if x+1/x=4 find the value of x3+1/x3 =

7

8

-7

-8

quick​

Answer 1

Answer:

x+1/ x = 4

x+1 = 4x

1 = 3x

x = 1/3

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

is 8

Answer 2

Step-by-step explanation:

If x+1/x=4

Then,

x3+1/x3=4 upon 3

x3+1/x3+2 X x+1/x=64

so ,

x3+1/x3=64

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