Question

x plus one upon X is equals to 7 then find the value of x cube + 1 upon x cube

Answer 1

,.....................
.

Answer 2

x^3+y^3=(x+1/x)(x^2+1/x^2-1)
=(7)[(x+1/x)^2-2]
=7[(7)^2-2]
=7[49-2]
=7*47
=329