Joshua Yap's answer to care beAr's Secondary 4 A Maths Singapore question.

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Joshua Yap
Joshua Yap's answer
27 answers (Tutor Details)
1st
Orange wordings are explanations to working.
Eric Nicholas K
Eric Nicholas K
2 years ago
This technique is more suitable for A Level students, though the tutor has explained it well.

The other technique, using

INT [f’(x) / f(x)] dx = ln f(x) + constant

is also in the A Levels, although I know that a handful of Sec 4 students are capable of noticing this.