The sum of first 25 terms of the arithmetic sequence 1,6,11
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Answer:
1525
Step-by-step explanation:
The A.P. is 1,6,11 16,21,26,31,36,41,46,51,56,61,66,71,76,81,86,91,96,101,106,111,116,121.
by addin them, the answer will be 1525.
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