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  1. The sum to 12 terms of an AP is equal to the sum to 18 terms. What will be the sum to 30 terms for this series ?
    1. 3
    2. 2
    3. 1
    4. 0
Correct Option: D

As, S12 = S18
So, S11 = S19
S10 = S20
S9 = S19
.........
.........
.........
S0 = S30
As, S0 = 0
So, S30 = 0


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