Teaching MPPSC Assistant Professor Mock Test Series 2025 Engineering Mathematics Calculus Vector Calculus
यदि ϕ(x, y, z) घात 4 का एक अदिश समघात फलन हो, तो \(\rm \nabla .(ϕ \vec{r})=\) _______ होगा, जहाँ \(\rm \vec{r}=x \vec{i}+y \vec{j}+z \vec{k}\)
1
4 ϕ
2
16 ϕ
3
7 ϕ
4
8 ϕ