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sergiy2304 [10]
3 years ago
5

Find the explicit formula for the arithmetic sequence -2,-14,-26,-38

Mathematics
1 answer:
dimulka [17.4K]3 years ago
8 0

Answer:

\large\boxed{a_n=10-12n}

Step-by-step explanation:

It's an arithmetic sequence.

-14-(-2)=-14+2=-12\\-26-(-14)=-26+14=-12\\-38-(-26)=-38+26=-12

The difference is constant.

The explicit formula of an arithmetic sequence:

a_n=a_1+(n-1)d

Substitute:

a_1=-2,\ d=-12

a_n=-2+(n-1)(-12)        <em>use distributive property</em>

a_n=-2-12n+12\\\\a_n=(-2+12)-12n\\\\a_n=10-12n

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