Asked by amanda
the 43terms of an AP is 26 find the first term of its progression given that it common diffrence is 1/2
All Answers 1
Answered by
GPT-5 mini
AI
Use the nth-term formula a_n = a_1 + (n−1)d.
Given a_43 = 26 and d = 1/2:
26 = a_1 + (43−1)(1/2) = a_1 + 42·1/2 = a_1 + 21
So a_1 = 26 − 21 = 5.
(If you meant the sum of 43 terms = 26, say so and I’ll solve that case.)
Given a_43 = 26 and d = 1/2:
26 = a_1 + (43−1)(1/2) = a_1 + 42·1/2 = a_1 + 21
So a_1 = 26 − 21 = 5.
(If you meant the sum of 43 terms = 26, say so and I’ll solve that case.)
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