Saved Bookmarks
| 1. |
211.If a, b, c are in А.Р., then (a-c)-(a) 1(c) 3- ac(b) 2(d) 4 |
|
Answer» As A, B and C are in AP,b-a=c-b(a-c)^2 = (2b-2c)^2= 4(b^-2bc+c^2)b^2-ac= b^2 –c(2b-c)= b^2- 2bc +c^2(a-c)^2 / (b^2 –ac) = 4 |
|