find the sum of first 30 positive integers divisible by 8
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Answer:
Step-by-step explanation:
8 ,16,24,32 ................
Sn = n/2 (2a + (n-1) d)
S30 = 30/2 (2× 8 + (30- 1) 8 )
= 15 (16) + (29)8
= 240 + 232
S30 = 472
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