Question

how to solve derivatives problems ​

Answer 1

Answer:--

with your mind and full contration

Answer 2

if u want to find dy/dx then,

first find dy/dt & then dx/dt

so let's find dy/dt

if y= (1-t²)/(1+t²)

then

dy/dt = {(1+t²)(-2t) - (1-t²)/(2t)}/(1+t²)²

dy/dt={-4t/(1+t²)²}

now as well dx/dt={(2a-2at²)/(1+t²)²}

now do (dy/dt)/(dx/dt)

=dy/dt = {2t/(at²-a)}

Thanks.....