Question

Va rog pe 6 am nevoie mare de ajutor dau 50 de puncte​

Answer 1

Răspuns:

Explicație pas cu pas:

.

Spor

Answer 2

Răspuns: $\bf n<5\implies \red{\underline{n \in \{0,1,2,3,4\}}}$

Explicație pas cu pas:

$\bf \dfrac{9^n}{27^4} ~<~\dfrac{3^{10}}{81^3}$

$\bf \bf \dfrac{\big(3^2\big)^n}{\big(3^2\big)^4} ~<~\dfrac{3^{10}}{\big(3^4\big)^3}$

$\bf \bf \dfrac{3^{2n}}{3^{2\cdot4}} ~<~\dfrac{3^{10}}{3^{4\cdot3}}$

$\bf \bf \dfrac{3^{2n}}{3^{12}} ~<~\dfrac{3^{10}}{3^{12}}$

$\bf 3^{2n}:3^{12} ~<~3^{10}:3^{12}$

$\bf 3^{2n-12} ~<~3^{10-12}$

$\bf 3^{2n-12} ~<~3^{-2}\implies 2n-12<-2$

$\bf 2n<-2+12$

$\bf 2n<10~~\bigg|:2$

$\bf n<5\implies \red{\underline{n \in \{0,1,2,3,4\}}}$

==pav38==