2 years ago

Find the 78th term of the arithmetic sequence -12,-13,-14,

Mathematics

1 answer:

creativ13 [48]2 years ago

8 0

Answer:

-89

Step-by-step explanation:

The first term of the sequence is a1 = -12.

The common difference between terms is ...

d = -13 -(-12) = -1

The generic term is given by ...

an = a1 +d(n -1)

Then the 78th term is ...

a78 = -12 +(-1)(78 -1) = -12 -77

a78 = -89

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