Q. {g(1)=−19g(n)=g(n−1)+6Find an explicit formula for g(n).g(n)=
Identify sequence type: Identify the type of sequence. The sequence is defined recursively with each term being 6 more than the previous term, which indicates that it is an arithmetic sequence.
Determine first term and common difference: Determine the first term and the common difference of the sequence. The first term g(1) is given as −19, and the common difference is the amount added to each term to get the next term, which is 6.
Use explicit formula for arithmetic sequence: Use the explicit formula for an arithmetic sequence, which is g(n)=g(1)+(n−1)d, where g(1) is the first term and d is the common difference. Here, g(1)=−19 and d=6.
Substitute values into formula: Substitute the values of g(1) and d into the formula to find the explicit formula for g(n). The formula becomes g(n)=−19+(n−1)×6.
Simplify the formula: Simplify the formula. Distribute the 6 into the parentheses: g(n)=−19+6n−6.
Combine like terms for final formula: Combine like terms to get the final explicit formula for the sequence. g(n)=6n−25.
More problems from Write a formula for an arithmetic sequence