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Anettt [7]
2 years ago
6

​ g(1)=−19 g(n)=g(n−1)+6 ​ Find an explicit formula for g(n)g(n)g, left parenthesis, n, right parenthesis. g(n)=g(n)=g, left par

enthesis, n, right parenthesis, equals
Mathematics
1 answer:
Artemon [7]2 years ago
5 0

Answer:

g(n) =  6n -25

Step-by-step explanation:

Given:

g(1) = -19

g(n) = g(n - 1) + 6

Required

The explicit formula

Let n = 2; So, we have:

g(n) = g(n - 1) + 6

g(2) = g(2 - 1) + 6

g(2) = g(1) + 6

g(2) = -19 + 6

g(2) = -13

So, we have:

g(1) = -19 ----- First term

g(2) = -13

Calculate common difference (d)

d = g(2) - g(1)

d = -13 --19

d = 6

The explicit function is then calculated as:

g(n) = a + (n - 1)d

Where

a = -19 --- First term

So:

g(n) = a + (n - 1)d

g(n) = -19 + (n - 1)*6

Open bracket

g(n) = -19 + 6n - 6

Collect like terms

g(n) =  6n - 6-19

g(n) =  6n -25

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