$\text { Find the gradient of } f ( x , y , z ) = x ^ { 4 } e ^ { y z } \text { at the point } P ( - 2,0 , - 9 ) \text {. }$

Short Answer

$\text { Find the gradient of } f ( x , y , z ) = x ^ { 4 } e ^ { y z } \text { at the point } P ( - 2,0 , - 9 ) \text {. }$