x minus 1 by x is equal to 7 find the value of x cube minus 1 by xcube
Answers
Answered by
1
Given x-1/x=7
=>x-1=x*7
=>x-1=7x
=>7x-x=-1
=>6x=-1
=>x=-1/6
Now,
x^3-1/x^3
=(-1/6)^3-1/(-1/6)^3
=-1/216-1/-1/216
=-1-216/216/-1/216
=-215/216/-1/216
=-215/-1
=215
Hope it helps
=>x-1=x*7
=>x-1=7x
=>7x-x=-1
=>6x=-1
=>x=-1/6
Now,
x^3-1/x^3
=(-1/6)^3-1/(-1/6)^3
=-1/216-1/-1/216
=-1-216/216/-1/216
=-215/216/-1/216
=-215/-1
=215
Hope it helps
Similar questions