Question

The the 6th term of an ap is 28 and 14th term is the 21 ST term

Answer 1

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13dLet the first term is a and common difference is d

Let the first term is a and common difference is da

Let the first term is a and common difference is da 14

Let the first term is a and common difference is da 14

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13d

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13dPut value a=−d in equation (2) we get

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13dPut value a=−d in equation (2) we get−d+5d=−8

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13dPut value a=−d in equation (2) we get−d+5d=−8⇒4d=−8

Let the first term is a and common difference is da 14 =a+(14−1)d=a+13dPut value a=−d in equation (2) we get−d+5d=−8⇒4d=−8⇒d=−2

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