اگر $h\left( x \right)=f\left( x \right)+g\left( x \right)+u\left( x \right)$ باشد کدام رابطه زیر صحیح است؟
1 ${h}'\left( x \right)={f}'\left( x \right)+{g}'\left( x \right)+u\left( x \right)$
2 ${h}'\left( x \right)={f}'\left( x \right)+g\left( x \right)+{u}'\left( x \right)$
3 ${h}'\left( x \right)=f\left( x \right)+{g}'\left( x \right)+{u}'\left( x \right)$
4 ${h}'\left( x \right)={f}'\left( x \right)+{g}'\left( x \right)+{u}'\left( x \right)$