4^x-5*2^x+4=0 решение уравнений. Created by angella73. algebra-ru

4^x-5*2^x+4=0 решение уравнений...

Verified answer

4^x - 5*2^x + 4 = 0
2^x = t

t^2 - 5t + 4 = 0
D = 25 - 16 = 9
t1 = (5 + 3)/2 = 8/2 = 4;
t2 = (5 - 3)/2 = 2/2 = 1;

2^x = 4
2^x = 2^2
x = 2

2^x = 1
2^x = 2^0
x = 0

2 votes Thanks 1

sedinalana

Verified answer

2^2x -5*2^x+4=0
2^x=a
a²-5a+4=0
a1+a2=5 U a1*a2=4
a1=1⇒2^x=1⇒x=0
a2=4⇒2^x=4⇒x=2
Ответ x=0;x=2

2 votes Thanks 1

Answers & Comments

Verified answer

Verified answer

srochno dayu 30 ballov za 3 i 4 zadaniet

srochno dayu 30 ballov reshit uravnenie 2h3 h2 13h 60

prologarifmirovat po osnovaniyu 3 vyrazhenie v kotorom agt0 i bgt0 81a3

uprostit vyrazhenie 1 2a 05 b 2 b 22a 05 3 a v stepeni ko

srochno reshit 06h 3gt0362h1

najti dlinu otrezka soedinyayushego a 6 23 i nachalo koordinat

pered vami tri otryvka iz istoricheskogo istochnika vnimatelno prochitajte ih i o

vysota ravnobedrennoj trapecii abcd provedennaya iz vershiny c delit osnovanie ad3626b806a5488ec7d1334d0f6400960c 80234

srochnodayu 40 ballov tri ploskosti parallelnypryamye a i b peresekayut eti plosk

tochka o centr okruzhnosti na kotoroj lezhat tochki a b i c izvestno chto 74

рекомендуемые вопросы

Helpful Links

Helpful Social