Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Indefinite Integration

Question:

Find an anti-derivative of the function $3x^2 + 4x^3$ using the method of inspection.

Options:

$x^2 + x^3$

$6x + 12x^2$

$\frac{3x^3}{2} + \frac{4x^4}{3}$

$x^3 + x^4$

Correct Answer:

$x^3 + x^4$

Explanation:

The correct answer is Option (4) → $x^3 + x^4$

We look for a function whose derivative is $3x^2 + 4x^3$.

$\frac{d}{dx} (x^3 + x^4) = 3x^2 + 4x^3.$

Therefore, an anti derivative of $3x^2 + 4x^3$ is $x^3 + x^4$.