Question

x=2at^4
y=-2at^5
find d^2y/dx^2=?

Answer 1

take the derivative of both dy/dt and dx/dt 2 times
then divide d^2y/dt^2 by d^2x/dt^2
u wud get answer
i hope u noe how to take derivative

Answer 2

yah i know how to take derivative and thanx i will do it now

Answer 3

is a constant

Answer 4

n pleasure helpin :)

Answer 5

thanx

Answer 6

Alternatively, notice that as
x = 2at^4, it follows that
\[ t = (x/2a)^{1/4} \]
Now substitute that into y = -2at^5 and you have y as a function of x.

It is then apparent that \( d^2y/dx^2 \) is not a constant.