Q. {g(1)=−29,g(n)=g(n−1)⋅(−4) Find an explicit formula for g(n). g(n)=
Given Information: We are given that g(1)=−29 and that g(n)=g(n−1)×(−4) for n > 1. This is a recursive definition of the function g. To find an explicit formula, we need to determine how g(n) is related to the initial value g(1) when n increases.
Identifying Pattern: Let's look at the first few terms to see if we can identify a pattern. We know g(1)=−29. Using the recursive formula:g(2)=g(1)×(−4)=−29×(−4)=116.g(3)=g(2)×(−4)=116×(−4)=−464.
Geometric Sequence Analysis: We can see that each term is −4 times the previous term. This is a geometric sequence with the first term a=g(1)=−29 and common ratio r=−4. The nth term of a geometric sequence is given by the formula a⋅r(n−1).
Explicit Formula: Substituting the values of a and r into the formula for the nth term, we get:g(n)=−29⋅(−4)(n−1).This is the explicit formula for g(n).
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