Question

If the first term of an ap is 2 and common difference is 4, then sum of its first 10 terms is *

Answer 1

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Answer 2

Answer:

The sum of its 10 terms is 200.

Step-by-step explanation:

Given :

First term,(a) = 2 , common Difference ,d = 4 , n = 10

By using the formula ,Sum of nth terms , Sn = n/2 [2a + (n – 1) d]

S10 = 10/2 [2 x 2 + (10 - 1) 4]

S10 = 5 [4 +( 9 × 4)]

S10 = 5 (4 + 36)

S10 = 5 × 40

S10 = 200

Hence, the sum of its 10 terms is 200.

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