Saved Bookmarks
| 1. |
The sum of 3 numbers i n Ap is 12 and sum of their cubes is 288.find Ap |
| Answer» Let Three numbers be a-d ,a ,a+d a-d+a+a+d=123a=12a=4Now ,(a-d)3+a3+(a+d)3=288 Substitute the value of a(4-d)3 +64 +(4+d)3=288Substitute the formula (a +b)3You will get d Then you will get the required A.P | |