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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x-4 < 0
3*x^-1 < 4
3*x^-1 < 4 // : 3
x^-1 < 4/3
1/(x^1) < 4/3
x <> 0
1/(x^1) < 4/3 // * x^2
(x^2)/(x^1) < 4/3*x^2
x^1 < 4/3*x^2
x-4/3*x^2 < 0
x^1*(1-4/3*x) < 0
x < 0
-(abs(x))^1*(4/3*(abs(x))^1+1) < 0 // : -(abs(x))^1
4/3*(abs(x))^1+1 > 0
4/3*(abs(x))^1 > -1 // : 4/3
(abs(x))^1 > -1/4/3
(abs(x))^1 > -3/4 // ^ 1/1
abs(x) > (-3/4)^(1/1)
abs(x) > -3/4
x in (-oo:0)
x < 0
x > 0
x^1*(1-(4/3*x^1)) < 0 // : x^1
1-(4/3*x^1) < 0
1 < 4/3*x^1 // : 4/3
1/4/3 < x^1 // ^ 1/1
(1/4/3)^(1/1) < x
x in (3/4:+oo)
x > 0
x in (-oo:0) U (3/4:+oo)
x in (-oo:0) U (3/4:+oo)
(-oo:0) U (3/4:+oo)
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