(adsbygoogle = window.adsbygoogle || []).push({}); is this equation linear or nonlinear??

Hello,

I am a little bit confused.. Is the following equations linear or non linear:

(dy/dt)^2+2y(t) = x(t).

(here i don't know if (d^2y/dt^2) = (dy/dt)^2 ,if this is true then i know it's linear)

dy/dt +(sin(t))y(t) = dx/dt +2x(t)

(does having derivative of x in the R.H.S make this equation non linear)

y(t) = Sx(T)dT

('S' means integrated from -infinity to 't', 'T' means (tao)) i am thinking this is linear...

Thanks in advance.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Is this equation linear or nonlinear?

**Physics Forums | Science Articles, Homework Help, Discussion**