Question

Can 280 be the sum of consecutive terms of arithmetic sequence 8,14,20..?​

Answer 1

Answer:

no

Step-by-step explanation:

as the series is 2+6n , where n is a positive integer,

280 needs to be a sum of a multiple of 6 with 2.

ie 278 should be a multiple of 6 which is not possible.

hence proved.