Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If $a+\frac{1}{a}$ = p2 , then find $a^2+\frac{1}{a^2}$.

Options:

$P^2 − 2$

$P^2 + 2$

$P^4 − 2$

$P^4 + 2$

Correct Answer:

$P^4 − 2$

Explanation:

If $K+\frac{1}{K}=n$

then, $K^2+\frac{1}{K^2}$ = n2 – 2

If $a+\frac{1}{a}$ = p2 

Then $a^2+\frac{1}{a^2}$ = $P^4 − 2$