2cos(x^(1/2))

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Solution for 2cos(x^(1/2)) equation: 


D( x )

x < 0

x < 0

x in <0:+oo)

2*cos(x^(1/2)) = 0

cos(x^(1/2)) = 0

cos(x^(1/2)) = 0  <=>  x^(1/2) = pi*k_1+pi/2 i k_1 należy do I

t_1 = pi*k_1+pi/2

x^(1/2)-t_1 = 0

1*x^(1/2) = t_1 // : 1

x^(1/2) = t_1

x^(1/2) = t_1 // ^ 2

x = t_1^2

x = pi*k_1+pi/2^2 i k_1 należy do I

2*cos(x^(1/2)) = 0  <=>  2 = 0 or 2*cos(x^(1/2)) = 0  <=>  cos(x^(1/2)) = 0

x = pi*k_1+pi/2^2

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