The last term of an arithmetic sequence is 63, the common difference is 5 and the sum is 426. how do you find the first term?
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Step-by-step explanation:
The formula to find the sum of the first n terms of our sequence is n divided by 2 times the sum of twice the beginning term, a, and the product of d, the common difference, and n minus 1. The n stands for the number of terms we are adding together.
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to find answer you need to use this formula- Sn=n/2(a+l)
hope it helps you ✌️
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