ConceptSum of First n Terms of an AP

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#### Question

Find the sum of all numbers from 50 to 350 which are divisible by 6. Hence find the 15^{th} term of that A.P.

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Show that a_{1}, a_{2 }… , a_{n} , … form an AP where a_{n} is defined as below

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Solution for concept: Sum of First n Terms of an AP. For the course 9th - 10th SSC (English Medium)