UNA INECUACIÓN!!!!
x4-13x2+36<- 0
x^4 -13x²+36<= 0
sustituyo z = x²
entonces
z² - 13z + 36 = 0...factorizamos
z1=4..........z2= 9
z1= x².........................z2=x²
4 = x².......................... 9 = x²
x1= 2...x2= - 2............x3= 3....x4= - 3
(x -2)< = 0......(x +2)<=0.......(x-3)<=0.......(x+3)<= 0
x< =2.................x<= - 2...........x<=3...............x<= - 3
x pertenece al intervalo cerrado de -3 a + infinito
espero que te sirva, salu2!!!
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x^4 -13x²+36<= 0
sustituyo z = x²
entonces
z² - 13z + 36 = 0...factorizamos
z1=4..........z2= 9
entonces
z1= x².........................z2=x²
4 = x².......................... 9 = x²
x1= 2...x2= - 2............x3= 3....x4= - 3
(x -2)< = 0......(x +2)<=0.......(x-3)<=0.......(x+3)<= 0
x< =2.................x<= - 2...........x<=3...............x<= - 3
x pertenece al intervalo cerrado de -3 a + infinito
espero que te sirva, salu2!!!