Que 7- Find the directionalof the f(n,y,z)=x²yz + uxz² at the point (1,-2,-1) in the direction of vector 2 i- j- 2 k
Answer (1)
17th Jan, 2022
Hi aspirant,
To find the directional derivative we need to use the concept of partial differentiation so f(x,y,z)= 2xyz i + xz² j . Now placing the given value of points we get, 4i + j. Now to find its value in in direction of a given vector we need to find its dot product with the same and divide it by its modulus.
i.e. 8-1/9=7/9.
Hope it helps!!
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