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1. |
Let a1 , a2 ,........a3n be an arithmetic progression with a1 = 3 and a2 = 7. If a1 + a2 + ....+a3n = 1830, then what is the smallest positive integer m such that m (a1 + a2 + .... + an ) > 1830? |
A. | 8 |
B. | 9 |
C. | 10 |
D. | 11 |
Answer» C. 10 | |