Question

if x2+1/x2=7,find the value of x3+1/x3

Answer 1

Answer:

X3+1/x3=1/2

Step-by-step explanation:

X2+1/x2=7

x2+1=14x

1=14x-2x

1=12x

X=1/12

now,

X3+1/X3=(1/12)3+1/1/12(3)=1/4+1/4=1/2