Definite Integration
Grade 12

Question:

<p>Let g be a differentiable function satisfying&nbsp;<span class="math-tex">\(\int_\limits{0}^{x}\)</span>&nbsp;(x - t + 1) g(t) dt = x<sup>4</sup>&nbsp;+ x<sup>2</sup>&nbsp;for all&nbsp;<span class="math-tex">\(x \geq 0\)</span>. The value of&nbsp;<span class="math-tex">\(\int_\limits{0}^{1} \frac{12}{g^{\prime}(x)+g(x)+10}\)</span>&nbsp;dx is equal to :&nbsp;</p>
<p style="display:inline"><span class="math-tex">\(\frac{\pi}{3}\)</span></p>
<p style="display:inline"><span class="math-tex">\(\frac{\pi}{2}\)</span></p>
<p style="display:inline"><span class="math-tex">\(\frac{\pi}{4}\)</span></p>
<p style="display:inline"><span class="math-tex">\(\frac{\pi}{6}\)</span></p>

Step-by-Step Solution

Key Concept: Differentiate the given integral equation twice using the Leibniz Rule to obtain a direct expression for g'(x) + g(x), which simplifies the integrand into a standard form.
<p><span class="math-tex">$\frac{\pi}{4}$</span></p>
Correct Answer: C

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