SOLUTION: 34. The first three terms in the expansion of (1+ay)^n are 1, 12y, and 68y^2 Evaluate a & n. Use the fact that (1 + ay)n = 1 + nay + n(n-1)/2 (ay)2 + _ _

SOLUTION: 34. The first three terms in the expansion of (1+ay)^n are 1, 12y, and 68y^2 Evaluate a & n. Use the fact that (1 + ay)n = 1 + nay + n(n-1)/2 (ay)2 + _ _ _

Question 144476: 34. The first three terms in the expansion of (1+ay)^n are 1, 12y, and
68y^2
Evaluate a & n. Use the fact that
(1 + ay)n = 1 + nay + n(n-1)/2 (ay)2 + _ _ _

Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
The first three terms in the expansion of are , , and
the fact is that

Compare coefficients,
......(1)
......(2)
From (2), we have
......(3)
Plug in in (3):

Solve for :

Check:

=

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