por favor me ajudem aee 71 pontos.... Pergunta de ideia demateus666

mateus666 @mateus666

March 2022 1 35 Report

por favor me ajudem aee 71 pontos

Lista de comentários

MATHSPHIS

Verified answer

A) $f(x)=3^{x}$

Crescente.

b) $f(x)=\left(\dfrac{2}{5}\right)^{x}$ .

Decrescente.

c) $f(x)=2^{x-1}$

Crescente.

a) $2^{x}=64~~\Rightarrow~~2^{x}=2^6~~\Rightarrow~~\boxed{x=6}$ .

b) $3^{x-2}=9~~\Rihtarrow~~3^{x-2}=3^2~~\Rightarrow~~x-2=2~~\Rightarrow~~\boxed{x=4}$ .

c) $5^{x^2-2x}=125~~\Rightarrow~~5^{x^2-2x}=5^3~~\Rightarrow~~x^2-2x=3~~\Rightarrow~~x^2-2x-3=0$ .

$\Delta=(-2)^2-4\cdot1\cdot(-3)=4+12=16$

$x=\dfrac{-(-2)\pm\sqrt{16}}{2}=\dfrac{2\pm4}{2}=1\pm2$

$x'=1+2=3$ e $x"=1-2=-1$ .

d) $3^{x-5}=27^{1-x}~~\Rightarrow~~3^{x-5}=(3^3)^{1-x}~~\Rightarrow~~3^{x-5}=3^{3-3x}$

$x-5=3-3x~~\Rightarrow~~3x+x=3+5~~\Rightarrow~~4x=8~~\Rightarrow~~x=2$ .

3) $M(t)=50.000\cdot(1,1)^{t}$

a) 3 meses.

$M(3)=50.000\cdot(1,1)^3=50.000\cdot1,331=66~550$

b) 6 meses.

$M(6)=50.000\cdot(1,1)^6=50.000\cdot1,771561=88~578,05$

c) 1 ano = 12 meses.

$M(12)=50.000\cdot(1,1)^{12}\approx156,921,42$ .

2 votes Thanks 1

More Questions From This User See All

mateus666 March 2022 | 0 Respostas

mateus666 March 2022 | 0 Respostas

mateus666 October 2020 | 0 Respostas

por favor me ajudem ai :\ (do todos meus pontos)

mateus666 October 2020 | 0 Respostas

mateus666 October 2020 | 0 Respostas

quem trabalha na atual sociedade capitalista e por que trabalha?por que trabalhamos?

mateus666 October 2020 | 0 Respostas

Mateus666 May 2020 | 0 Respostas

Complete the sentences witch the simple present of the verbs in the box according to the changing of the guard(to return-to spend- to get- to arrive- to leave- to eat - to blow - to stay- to survive- to lay- to fall- to go- to travel)1- the male penguins____together,very near each other.2-every year,female emperors_to the open sea to _their food3-those dedicated fathers__nothing during that whole time4-femalesone single egg and then_it behind!5-emperor penguins_ the long antarctic winter on the open ice6-the snow.the wind_very,very hard.7-winter_in antarctica in march8-the penguinsabout 80 kilometers across the frozen surface every winter9-the antarctic winter is harsh,but the penguins_10-finally after over two months teh females____ from the sea.

Mateus666 April 2020 | 0 Respostas

Indique qual das alternativas a seguir traz um exemplo de materia,corpo e objeto,nesa ordem:a)agua,escultura de gelo e chuva b)madeira,mesa de madeira e tabuac)lycra,blusa de lycra e fio de lycrad)marmore,placa de marmore e pia de marmore

Mateus666 April 2020 | 0 Respostas

Mateus666 April 2020 | 0 Respostas

Helpful Links

Política de Privacidade

Termos e Condições

direito autoral

Helpful Social

Copyright © 2024 ELIBRARY.TIPS - All rights reserved.