Wee Yong Geng, Eldric's answer to Jason Lim's Secondary 3 A Maths Singapore question.
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Bear in mind that when we compare coefficients, we remove the x part of 'kx' so:
While the nth term is (kx)^n times (9 choose n), the nth term coefficient is k^n times (9 choose n)
While the nth term is (kx)^n times (9 choose n), the nth term coefficient is k^n times (9 choose n)
Date Posted:
3 years ago
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