Further pure Mathematics 2（fpe) · 专业版

Example: In 1st order linear equations, did I add the constant of integration immediately after integrating the RHS?

许多考生在此处解一阶线性方程时，在积分右边项后必须立即加常数 $C$。切记：$C$ 也要除以积分因子 $I(x)$。错误写法：$y = \text{Integral} + C$（$C$ 未被除）；正确写法：$y \cdot I(x) = \text{Integral} + C$。，导致扣分。