The 15th term of arthimetic sequence is 43 and the common difference is 4 find the first term

Question

Mathematics

Belinda Hendricks

3 October, 10:02

The 15th term of arthimetic sequence is 43 and the common difference is 4 find the first term

+4

Answers (1)

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Genevieve Werner · Answer 1

Step-by-step explanation:

hello:

the nth term of an arithmetic sequence is:

An = An + (n-p) d ... a common difference is : d

let : n=15 and p=1 d = 4 A15 = 43

A15 = A1 + (15-1) (4)

43 = A1 + 56

A1 = 43-56 = - 13