-16cos(16/x)

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Solution for -16cos(16/x) equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

-16*cos(16/x) = 0

cos(16/x) = 0

cos(16/x) = 0  <=>  16/x = pi*k_1+pi/2 i k_1 należy do I

t_1 = pi*k_1+pi/2

16/x-t_1 = 0

16*x^-1 = t_1 // : 16

x^-1 = t_1/16

-1 < 0

1/(x^1) = t_1/16 // * x^1

1 = (t_1/16)*x^1 // : t_1/16

16*t_1^-1 = x^1

x = 16*t_1^-1

x = 16*pi*k_1+pi/2^-1 i k_1 należy do I

-16*cos(16/x) = 0  <=>  -16 = 0 or -16*cos(16/x) = 0  <=>  cos(16/x) = 0

x = 16*pi*k_1+pi/2^-1

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