Solution
Given : $$x-\frac{1}{x}=2$$
Cubing both sides, we get :
=> $$(x-\frac{1}{x})^3=(2)^3$$
=> $$x^3-\frac{1}{x^3}-3((x)-(\frac{1}{x}))=8$$
=> $$x^3-\frac{1}{x^3}-3*2=8$$
=> $$x^3-\frac{1}{x^3}=8+6=14$$
=> Ans - (C)
Video Solution
Click on the Email ☝️ to Watch the Video Solution
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
