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| 1. |
Show that sum of an A.P. whose first term is 'a' , the second term is 'b' and last term 'c' = (a+c)(b+c-2a)/2(b-a) |
| Answer» Show that sum of an A.P. whose first term is 'a' , the second term is 'b' and last term 'c' = (a+c)(b+c-2a)/2(b-a) | |