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The sum of the 8 terms of A.P. is 12,17, 22,.... is​

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Answer:

236

Refer to the formulae in the attached image and remember them.

Using the second formula for sum:

a = 12, d = 5, n = 8

S = 8/2 [2(12) + (8-1) x 5]

S = 4(24 + 35)

S = 4(59)

S = 236

262
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