Eric Nicholas K's answer to Kathy's Secondary 4 A Maths Singapore question.
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Here is my working for part (c). Alas, there is no hard and fast rule on which method is the easiest. I will now do part (iv), and once done, I will show you how to compare coefficients for part (i).
Date Posted:
5 years ago
Setting x = 0 instead of x = 1 at the start may have been a slightly better choice.
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