a1=2, n=17, d=3 find sn?
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Answer:
442 is the answer.
Step-by-step explanation:
sn = n/2 [2a + (n - 1)d]
= 17/2 [2×2 + (17 - 1)3]
= 17/2 [4+(16)3]
= 17/2 (4 + 48)
= 17/2 × 52
=17×26
=442
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