Q. {h(1)=−17,h(n)=h(n−1)×0.2 Find an explicit formula for h(n). h(n)=
Given Information: We are given the first term of the sequence h(1)=−17 and a recursive formula h(n)=h(n−1)×0.2. To find an explicit formula, we need to recognize the type of sequence we are dealing with.
Identifying the Sequence Type: Since each term is obtained by multiplying the previous term by a constant factor 0.2), this sequence is geometric.
Geometric Sequence Formula: For a geometric sequence, the nth term is given by the formula h(n)=a⋅r(n−1), where a is the first term and r is the common ratio.
Substituting Values: We already know the first term a=h(1)=−17 and the common ratio r=0.2. Now we can substitute these values into the formula for the nth term of a geometric sequence.
Final Explicit Formula: Substituting the values, we get h(n)=−17⋅(0.2)n−1.
More problems from Write variable expressions for geometric sequences