![]() ![]() Step 2: Now, to find the fifth term, substitute n 5 into the equation for. So, to find the nth term, substitute the given values a 2 and. It is equal to n divided by 2 times the sum of twice the first term ‘a’ and the product of the difference between second and first term-‘d’ also known as common difference, and (n-1), where n is numbers of terms to be added. Step 1: The nth term of an arithmetic sequence is given by. We have two arithmetic sequence formulas. The sum of n terms of AP is the sum (addition) of first n terms of the arithmetic sequence. Geometric sequences are formed by multiplying or dividing the same number. For example, the sequence 1, 6, 11, 16, is an arithmetic sequence because there is a pattern where each number is obtained by adding 5 to its previous term.
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