If the roots of the equation (b - c)x2 + (c - a)x + (a-b) = 0 are equal, then

If the roots of the equation (b - c)x2 + (c - a)x + (a-b) = 0 are equal, then

2) If the third term of an AP is 12 and the seventh term is 24, then the 10th term is

3) A number 15 is divided into three parts which are in AP and sum of their squares is 83. The smallest part is

4) The sum of 5 numbers in AP is 30 and sum of their squares is 220. Which of the following is the third term ?

5) If the first term of an AP is 2 and common difference is 4, then sum of its first 40 terms is