Nothing
## parameters a <- sample(2:9, 1) b <- sample(seq(2, 4, 0.1), 1) c <- sample(seq(0.5, 0.8, 0.01), 1) ## solution res <- exp(b * c) * (a * c^(a-1) + b * c^a)
What is the derivative of $f(x) = x^{r a
} e^{r b
x}$, evaluated at $x = r c
$?
A formula is $$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.$$
r fmt(res)
r fmt(a)
r fmt(b)
r fmt(c)
r fmt(a+c)
There is some feedback here with R r fmt(res)
and formulae $$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$.
exname: Single Choice extype: schoice exsolution: 10000 exshuffle: TRUE
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