Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If a2 + b2 + \(\frac{1}{a^2}\) + \(\frac{1}{b^2}\)  = 4, a ≠ 0, b ≠ 0, then the value of \( {a }^{ 256} \) + \( {b }^{ 256} \) is?

Options:

2

256

0

128

Correct Answer:

2

Explanation:

Put a, b = 1 (let)

12 + 12 + \(\frac{1}{1^2}\) + \(\frac{1}{1^2}\)  = 4  (satisfied)

Therefore, \( {a }^{ 256} \) + \( {b }^{ 256} \)  = 1 + 1 = 2