Question

First term and common difference of an ap are 6 and 3 respectively;find s26

Answer 1

Answer:

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Answer 2

Answer:

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S26 = 1131

Step-by-step explanation:

a = 6

d = 3

↪ Sn = n/2[ 2a + (n-1) d

S26 = 26/2 [ 2×6 + (26-1)×3]

S26 = 13 [12 + 75]

S26 = 13 × 87

S26 = 1131

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