Eric Nicholas K's answer to Kathy's Secondary 4 A Maths Singapore question.
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Here is my working for part (d). Again, the choices are highly dependent on whether there are any nice bracketed terms at the start or not and also where the unknowns are placed.
Actually, instead of setting x = 4, setting x = 0 (achieves the same effect as comparing constants) might be slightly more appealing, since anything attached to x will vanish.
Actually, instead of setting x = 4, setting x = 0 (achieves the same effect as comparing constants) might be slightly more appealing, since anything attached to x will vanish.
Date Posted:
5 years ago