Question

Resolva as expressões a seguir :
( +1).(+3).( -6).(-2).(-1).(+2)=
(824):(+4) =
(+3) .(-2) .(+4).(-1) .(-5) .(-6)=

Answer 1

Resposta:

Uma dica pra vc na verdade, baixa o photomat. É um aplicativo que escaneia o cálculo e te dá a resposta e todo o desenvolvimento das contas.

Answer 2

Deu trabalho então lê tudo

Resposta: $f\left(t\right)=0;\quad \:l\ne \:0,\:t\ne \:0$

RESOLUÇÃO:

$\left(1\right)lef\left(t\right)t\left(3\right)lef\left(t\right)t\left(-6\right)lef\left(t\right)t\left(-2\right)lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(2\right)=$$\left(3\right)lef\left(t\right)t\left(-2\right)lef\left(t\right)t\left(4\right)lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)$

$\mathrm{Subtrair\:}\left(+3\right)lef\left(t\right)t\left(-2\right)lef\left(t\right)t\left(+4\right)lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)\mathrm{\:de\:ambos\:os\:lados}$$1\cdot \:lef\left(t\right)t\cdot \:3lef\left(t\right)t\left(-6\right)lef\left(t\right)t\left(-2\right)lef\left(t\right)t\left(-1\right)lef\left(t\right)t\cdot \:2-3lef\left(t\right)t\left(-2\right)lef\left(t\right)t\cdot \:4lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)=$$3lef\left(t\right)t\left(-2\right)lef\left(t\right)t\cdot \:4lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)-3lef\left(t\right)t\left(-2\right)lef\left(t\right)t\cdot \:4lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)$

Simplificar

$1\cdot \:lef\left(t\right)t\cdot \:3lef\left(t\right)t\left(-6\right)lef\left(t\right)t\left(-2\right)lef\left(t\right)t\left(-1\right)lef\left(t\right)t\cdot \:2-3lef\left(t\right)t\left(-2\right)lef\left(t\right)t\cdot \:4lef\left(t\right)t\left(-1\right)lef\left(t\right)t\left(-5\right)lef\left(t\right)t\left(-6\right)=0$

Fatorar

lef(t)t*3lef(t)t(-6)lef(t)t(-2)lef(t)t(-1)lef(t)t*2-3lef(t)t(-2)lef(t)t*4lef(t)t(-1)lef(t)t(-5)lef(t)t(-6): 1584$e^{5} l^{5} t^{5} f(t)^{5}$

$1584e^5l^5t^5f\left(t\right)^5=0$

$\mathrm{Usando\:o\:princípio\:do\:fator\:zero:\quad \:Se}\:ab=0\:\mathrm{então}\:a=0\:\mathrm{ou}\:b=0$

f(t)=0

A solução é

$f\left(t\right)=0;\quad \:l\ne \:0,\:t\ne \:0$