34. The first three terms in the expansion of (1 + ay)^n are 1, 12y and 68y^2. Evaluate a and n. Use the fact that... (1 + ay)^n = 1 + nay + n(n-1)÷ 2 (ay)^2 + ... Any help in evaluating 'a' and 'n' would be GREATLY appreciated!
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Originally Posted by cnmath16 34. The first three terms in the expansion of (1 + ay)^n are 1, 12y and 68y^2. Evaluate a and n. Use the fact that... (1 + ay)^n = 1 + nay + n(n-1)÷ 2 (ay)^2 + ... Any help in evaluating 'a' and 'n' would be GREATLY appreciated! Coefficient of y: .... (1) Coefficient of : .... (2) Now solve equations (1) and (2) simultaneously. Hint: Note that when you square equation (1) you get .
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