Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), find y.

Assessment: WAEC SSCE - Further Mathematics - 2013 (Objective) Subject: Further Mathematics

Question 1 Report

Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), find y.

Answer Details
Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), we can integrate both sides with respect to x to obtain the original function y(x). $$ \frac{\mathrm d y}{\mathrm d x} = \sqrt{x} \\ \int \frac{\mathrm d y}{\mathrm d x} \mathrm d x= \int \sqrt{x} \mathrm d x\\ y= \int x^{\frac{1}{2}} \mathrm d x \\ y= \frac{2}{3}x^{\frac{3}{2}} + c $$ where c is an arbitrary constant of integration. Therefore, the correct option is (b) \(\frac{2}{3}x^{\frac{3}{2}} + c\).

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