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Sindrei [870]
4 years ago
13

If you are good at sequences in math please help I am giving more points

Mathematics
2 answers:
slamgirl [31]4 years ago
5 0

Answer:

-20 + 7(n-1)

Step-by-step explanation:

It's already given that d, or the common difference, is 7. The only thing left to do is to find the first term of this sequence.

We are given that a_{11} = 50.

If we subtract the common difference 10 times we can find the first term.

- 7 x 10 = -70

50 - 70 = -20

The first term is -20. The only choice that shows this is the first one.

Mrrafil [7]4 years ago
3 0

Answer:

First one

Step-by-step explanation:

a11 = a1 + (11-1)(7)

50 = a1 + 70

a1 = -20

an = -20 + 7(n-1)

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