Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If a + \(\frac{1}{a}\) + 2 = 0, then find the value of (a49 - \(\frac{1}{a^{48}}\)) ?

Options:

0

-2

2

1

Correct Answer:

-2

Explanation:

a + \(\frac{1}{a}\) + 2 = 0

a + \(\frac{1}{a}\) = -2

a2 + 1 = -2a

(a + 1)2 = 0

a = -1

Now, a49 - \(\frac{1}{a^{48}}\)

= (-1)49 - \(\frac{1}{(-1)^{48}}\) = (-1) - (1) = -2