3-1/x²-1+10/1+x²=6/9. Created by Romaffgd. algebra-ru

9...

Romaffgd @Romaffgd

August 2022 1 6 Report

3-1/x²-1+10/1+x²=6/9

Answers & Comments

Universalka

Verified answer

$3-\frac{1}{x^{2}-1}+\frac{10}{1+x^{2}}=\frac{6}{9}\\\\3-\frac{1}{x^{2}-1}+\frac{10}{x^{2}+1}-\frac{2}{3}=0\\\\\frac{9x^{4}-9-3x^{2}-3+30x^{2} -30-2x^{4}+2}{3(x^{2}-1)(x^{2}+1)}=0\\\\\frac{7x^{4}+27x^{2}-40}{3(x^{2}-1)(x^{2}+1)}=0 \\\\7x^{4} +27x^{2}-40=0;x\neq-1;x\neq1$

Сделаем замену : x² = m , m ≥ 0

7m² + 27m -40 = 0

D = 27² - 4 * 7 * (-40) = 729 + 1120 = 1849 = 43²

$m_{1}=\frac{-27+43}{14}=\frac{16}{14}=\frac{8}{7}\\\\m_{2}=\frac{-27-43}{14}=-\frac{70}{14}=-5$

0 votes Thanks 0

kak prigotovit 80g 5 rastvora sahara i chto dlya etogo nuzhno proizvedem raschety

Answer

Answers & Comments

Verified answer

8 klass vypisat vse slovosochetaniya

drob34186d0b5395103469d63f7cba6f123a 55944

vynesite mnozhitel iz pod znaka kornya koren 4a koren 25b

x25 pomogite reshit

49...

3 13 2 srochno nuzhen otvet ya skoro umr

harakteristika zapadno sibirskogo bassejna 1 geograficheskoe polozhenie 2 zapa

pechorskij ugolnyj bassejn potrebiteli

komandy kotorye mozhet vypolnit konkretnyj ispolnitel obrazuyut 1 sredu ispol

kak prigotovit 80g 5 rastvora sahara i chto dlya etogo nuzhno proizvedem raschety

рекомендуемые вопросы

Helpful Links

Helpful Social