Question

for an a.p. first term is 14 and last term is 212 if sum of the all terms is11300 find the numbers of terms and common difference

Answer 1

We know that S = (n/2)(a + l)
n = number of terms
l = last term
d = common difference

S = (n/2)(226)
11300 = 113n
n = 100 terms

a + 99d =l
14 + 99d = 212
99d = 198
d = 2

Hence common difference is 2
Number of terms are 100 terms

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Answer 2

Answer:

Step-by-step explanation:

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