If the line \( y=m x+c \) touches the parabola \( y^{2}=4 a(x+a) \)...

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If the line \( y=m x+c \) touches the parabola \( y^{2}=4 a(x+a) \),
P then:

W
(1) \( c=a+a / m \)
(2) \( c=a m+a / m \)
(3) \( c=a m+a \)
(4) None of these
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