Q. {h(1)=−26,h(n)=h(n−1)⋅(−9) Find an explicit formula for h(n).h(n)=
Given Information: We are given the first term of the sequence h(1)=−26 and a recursive formula h(n)=h(n−1)×(−9). To find an explicit formula for h(n), we need to recognize the pattern of the sequence.
Recursive Formula: The sequence starts with h(1)=−26. Using the recursive formula, we can find the next few terms to identify the pattern:h(2)=h(1)⋅(−9)=−26⋅(−9)=234h(3)=h(2)⋅(−9)=234⋅(−9)=−2106We can see that each term is the previous term multiplied by −9.
Identifying the Pattern: Since the sequence is formed by multiplying the previous term by −9, this is a geometric sequence with the first term a1=−26 and common ratio r=−9.
Geometric Sequence: The explicit formula for a geometric sequence is given by:an=a1⋅r(n−1)Substituting a1=−26 and r=−9 into the formula gives us:h(n)=−26⋅(−9)(n−1)
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