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D( x )
e^x = 0
e^x = 0
e^x = 0
x należy do O
x in (-oo:+oo)
4*(1/(e^x))*sin(x) = 0
4*(1/(e^x)) = 0
1/(e^x) = 0
1/(e^x) = 0 // * e^x
1 = 0
4*(1/(e^x)) = 0 <=> 4 = 0 or 4*(1/(e^x)) = 0 <=> 1/(e^x) = 0
sin(x) = 0
sin(x) = 0 <=> x = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
x-t_1 = 0
x-t_1 = 0 // + t_1
x = t_1
x = pi*k_1 i k_1 należy do I
4*(1/(e^x))*sin(x) = 0 <=> 4*(1/(e^x)) = 0 or 4*(1/(e^x))*sin(x) = 0 <=> sin(x) = 0
x = pi*k_1
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