How to find a1 in an arithmetic sequence

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Find a1 of arithmetic sequence from given information. a7=-45

Calculate a formula for the general term based on the terms of an arithmetic sequence: a1=6anda7=42; A1=12anda12=6; A1=19anda26=56; A1=9anda31=141;

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find a1 in arithmetic series

If a1 is the first term of an arithmetic sequence and d is the common difference, then the formula for finding the nth term of the sequence is an = a1 + (n – 1)d. We have been

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How do you find a1 in the arithmetic series with s7=287 and d

Common difference between two terms (d) = (a1-a2) Sum of the series(S) = (n/2)[2a + (n – 1)d] First term = a; 2nd term = a+d; 3rd term = a+2d; similarly, Nth term = a+(n

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The answer to this math question is 42.
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