Two cars P and Q start from a point at the same time in a straight line and their positions are represented by x_p(t)= at+ bt^2 and x_1(t) =ft-t^2.At what time do the cars have the same velocity?

Two cars P and Q start from a point at the same time in a straight lin

1.	Two cars P and Q start from a point at the same time in a straight line and their positions are represented by x_p(t)= at+ bt^2 and x_1(t) =ft-t^2.At what time do the cars have the same velocity?
Answer» `(a-f)/(1+b)` `(a+f)/(2(b-1))` `(a+f)/(2(1+b))` `(f-a)/(2(1+b))` ANSWER :D