Answer by Manuel Eberl for Minimizing a function using gradient (example from...
You need the $i$, $j$, $k$ because the gradient is a vector, as it easy on the Wikipedia page. $i$, $j$ and $k$ are the unit vectors. Your gradient is actually:$\nabla f(x,y,z) = \left(2, 6y,...
View ArticleMinimizing a function using gradient (example from Wikipedia)
This example is from Wikipedia (http://en.wikipedia.org/wiki/Gradient):The gradient of function $f(x,y,z)=2x+3y^2-sin(z)$ is $\nabla f= \frac{\partial f}{\partial x} i +\frac{\partial f}{\partial y} j...
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