Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

Find the value of $ (1.6)^3 - (0.9)^3 -(0.7)^3$.

Options:

3.024

-3.024

-3.24

3.24

Correct Answer:

3.024

Explanation:

$ (1.6)^3 - (0.9)^3 -(0.7)^3$

If a + b + c = 0, then a3 + b3 + c3 = 3abc

1.6 - 0.9 - 0.7 = 0

(1.6)3 - (0.9)- (0.7)3

= (1.6)3 + (- 0.9)3 + (- 0.7)3

= 3 × 1.6 × (- 0.9) × (- 0.7)

= 3.024