Ex 5.3, 1 (i) Class 10 - Find sum of AP (i) 2, 7, 12 ,…., to 10 terms.
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Ex 5.3, 1 (i) Class 10 - Find sum of AP (i) 2, 7, 12 ,…., to 10 terms.
Ex 5.3, 1Find the sum of the following APs.(i) 2, 7, 12 ,…., to 10 terms. 2, 7, 12,…., to 10 term sWe know that Sum of AP = 𝑛/2 (2a (n – 1) d) Here n = 10, a = 2, & d = 7 – 2 = 2Putting these in formula , Sum = 𝒏/𝟐 (2a (n – 1) d) = 10/2 (2 × 2 (10 – 1) × 5)
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