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D( x )
x = 0
x^13 = 0
x = 0
x = 0
x^13 = 0
x^13 = 0
1*x^13 = 0 // : 1
x^13 = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x = 7/(x^13) // - 7/(x^13)
6/x-(7/(x^13)) = 0
6/x-7*x^-13 = 0
6*x^-1-7*x^-13 = 0
t_1 = x^-1
6*t_1^1-7*t_1^13 = 0
6*t_1-7*t_1^13 = 0
t_1*(6-7*t_1^12) = 0
-7*t_1^12 = -6 // : -7
t_1^12 = 6/7
t_1^12 = 6/7 // ^ 1/12
abs(t_1) = (6/7)^(1/12)
t_1 = (6/7)^(1/12) or t_1 = -(6/7)^(1/12)
t_1 = 0
t_1 = 0
t_1 = (6/7)^(1/12)
x^-1-(6/7)^(1/12) = 0
1*x^-1 = (6/7)^(1/12) // : 1
x^-1 = (6/7)^(1/12)
-1 < 0
1/(x^1) = (6/7)^(1/12) // * x^1
1 = (6/7)^(1/12)*x^1 // : (6/7)^(1/12)
1/((6/7)^(1/12)) = x^1
x = 1/((6/7)^(1/12))
t_1 = -(6/7)^(1/12)
x^-1+(6/7)^(1/12) = 0
1*x^-1 = -(6/7)^(1/12) // : 1
x^-1 = -(6/7)^(1/12)
-1 < 0
1/(x^1) = -(6/7)^(1/12) // * x^1
1 = -(6/7)^(1/12)*x^1 // : -(6/7)^(1/12)
1/(-(6/7)^(1/12)) = x^1
x = 1/(-(6/7)^(1/12))
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x naleu017Cy do O
x in { 1/((6/7)^(1/12)), 1/(-(6/7)^(1/12)) }
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