First Term and Common Difference of an A.P. Are 12 and 4 Respectively. If 96, Nt  Find N. - Algebra

Sum

First term and common difference of an A.P. are 12 and 4 respectively. If tn = 96 find n.

Solution

96 = 12 + (n-1)4

84/4 = (n - 1)

n - 1 = 21

n = 22

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