If r, s, and t are constants such that [tex] \frac{x^{r-2}\cdot

Ответ:

aashya16

12.03.2022

$\dfrac{x^{r-2}y^{2s}z^{3t+1}}{x^{2r}y^{s-4}z^{2t-3}}=x^{-r-2}y^{s+4}z^{t+4}=xyz$

$\implies\begin{cases}-r-2=1\\s+4=1\\t+4=1\end{cases}\implies r=s=t=-3$

$\implies r^st=(-3)^{-3}(-3)=(-3)^{-2}=\dfrac1{(-3)^2}=\dfrac19$

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KOAL

10.05.2021

Across the largest side is going to be largest angle, and across the smallest side -smallest angle.

Sides:

BC = 9 < AB = 13 < CA = 17.

Angles that are across sides: A < C < B.

Answer is d- A C B.

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