Teaching MPPSC Assistant Professor Mock Test Series 2025 Engineering Mathematics Calculus Vector Calculus
The directional derivative of \(\varnothing\)(x, y, z) = x2yz + 4xz2 at (1, -2, 1) in the direction of \(2 \hat{\imath}-\hat{\jmath}-2 \hat{k}\) is
1
\(-\frac{13}{3}\)
2
\(\frac{1}{3}\)
3
\(-\frac{1}{13}\)
4
\(\frac{13}{9}\)