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) A.P whose nth term is 2n-1 is

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

4) In a certain AP, 5 times the 5th term is equal to 8 times the 8th term, then its 13th term is equal to

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