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Sofiajayhengo
Answered

The first and last term of an arithmetic sequence is -3 and 25 respectively. If the common difference is 2, how many term are ther in the sequence?

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Answer:

n = 15

Step-by-step explanation:

An = a1 + ( n - 1 ) d

25 = -3 + ( n - 1 ) 2

25 = -3 + 2n - 2

25 = - 5 + 2n

25 + 5 = 2n

2n = 30

n = 15

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