Question

which formulas are used to solve AP question ​

Answer 1

AP = Arithmetic Mean

◆ Tn = nth term

◆ a = 1st term

◆ n = number of terms

◆ d = common difference

◆Sn = sum of n terms

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◆◆ Formula to find To term :-

◆ Tn = a + (n-1)d.

◆◆Formula to find Sum of AP

◆Sn = n/2 *{ 2a +( n-1)d}

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I Hope it helps you....