If f,g, and h are differentiable funct...

If `f,g`, and `h` are differentiable functions of `x ` and `"delta"=|[f,g,h],[(xf)',(xg)',(x h)'],[(x^2f)' ',(x^2g)' ',(x^2h)' ']|` prove that `"delta"^(prime)=|[f,g,f],[f',g', h '],[(x^3f' ')',(x^3g' ')',(x^3h ' ')']|`

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