Question : If $(y+\frac{1}{y})=8$, find the value of $(y^2+\frac{1}{y^2})$.
Option 1: 64
Option 2: 66
Option 3: 62
Option 4: 60
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
Correct Answer: 62
Solution :
$(y+\frac{1}{y}) = 8$
Squaring both sides, we get:
$(y+\frac{1}{y})^2 = 8^2$
⇒ $y^2+\frac{1}{y^2}+2×y×\frac{1}{y} = 64$
⇒ $y^2+\frac{1}{y^2} = 64 – 2$
⇒ $y^2+\frac{1}{y^2} = 62$
Hence, the correct answer is 62.
Related Questions
Know More about
Staff Selection Commission Combined High ...
Answer Key | Eligibility | Application | Admit Card | Preparation Tips | Result | Cutoff
Get Updates BrochureYour Staff Selection Commission Combined Higher Secondary Level Exam brochure has been successfully mailed to your registered email id “”.




