how many terms of the sequence 18,16,14......should be taken so that their sum is zero.
let's see what all is given first:
To find: n
use the Sum of n terms formula and then substitute,
Tranpose 2 to the other side we'll have,
Now take 2 common out of the bracket,
again transpose 2n to the other side,
So, Sum of 19 terms will give Sn as 0.
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