The equation of a wave pulse is given as \( \mathrm{P} \) \( y=\fra...

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The equation of a wave pulse is given as
\( \mathrm{P} \) \( y=\frac{A}{4+(2 t+0.5 x)} \), where \( t \) is in seconds and \( x \) in

W metres. The speed of the pulse is
(1) \( 8 \mathrm{~m} / \mathrm{s} \)
(2) \( 4 \mathrm{~m} / \mathrm{s} \)
(3) \( 2 \mathrm{~m} / \mathrm{s} \)
(4) \( 0.5 \mathrm{~m} / \mathrm{s} \)
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