How many terms of the A.P 1,5,9....must be taken so that their sum is 2415
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How many terms of the A.P 1,5,9....must be taken so that their sum is 2415
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Answer:
The required number of terms = 35
Step-by-step explanation:
First term , a = 1
Common Difference , d = 4
Sum = 2415
We need to find number of terms such that their sum is 2415
Since, number of terms cannot be negative
⇒ n = 35
Hence, The required number of terms = 35