 Hello and welcome to the session. Let us understand the following question which says, if x and y are connected parametrically by the equation given, without eliminating the parameter find d by by dx, the given equations are x is equal to 280 square and y is equal to 8 multiplied by t to the power 4. Now let us proceed on to the solution. We have to find dy by dx. First given to us is x is equal to 280 square and y is equal to 8 t to the power 4. dx by dt is equal to 480 and dy by dt is equal to 480 cube. Therefore, dy by dx is equal to dy by dt divided by dx by dt which is equal to dy by dt is equal to 480 cube and dx by dt is equal to 480. 4 and 4 gets cancelled, a and a gets cancelled, t gets cancelled with one t of t cube, so we are left with t square. Hence, the required value of dy by dx is t square. If you understood this question, that's all for the session. Bye and have a nice day.