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2 votes
2 votes
Can someone help please

Can someone help please-example-1
User Bey
by
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1 Answer

24 votes
24 votes

Answer:

a) an = 12 -2(n -1)

b) an = 25 -5(n -1)

Explanation:

The n-th term of an arithmetic sequence is given by ...

an = a1 +d(n -1) . . . . . first term a1, common difference d

__

a)

The first term is a1 = 12; the common difference is d = 10 -12 = -2.

The n-th term is ...

an = 12 -2(n -1)

__

b)

The first term is a1 = 25; the common difference is d = 20 -25 = -5. The n-th term is ...

an = 25 -5(n -1)

User Trizalio
by
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