engineering recuitment GATE ECE 2023-24 Test Series Engineering Mathematics Calculus Vector Calculus
The directional derivative of the field \(u\left( {x,y,z} \right) = {x^2} - 3yz\) in the direction of the vector \(\left( {\hat i + \hat j - 2\hat k} \right)\) at point \(\left( {2, - 1,\;4} \right)\) is ______.
Enter numerical value using the virtual keypad. Round off where necessary.