Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If a2 + b2 + c2 \(\frac{1}{a^2}\) + \(\frac{1}{b^2}\) +  \(\frac{1}{c^2}\) = 6, a ≠ 0, b ≠ 0, then the value of a5 + b5 + cis?

Options:

1

3

4

7

Correct Answer:

3

Explanation:

Put a, b, c= 1 (let)

12 + 12 + + 12 +  \(\frac{1}{1^2}\) + \(\frac{1}{1^2}\) + + \(\frac{1}{1^2}\)  = 6  (satisfied)

Therefore, a5 + b5 + c= 15 + 15 + + 15 = 1 + 1 +1  = 3