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At t=0, transverse pulse in a wire is de...

At t=0, transverse pulse in a wire is described by the function
`y=(6)/(x^(2)+3)`
where x and y are in metres. Write the function `y(x,t)` that describe this plus if it is travelling in the positive x-direction with a speed of `4.50 m//s`.

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`y =t/([(x - 4.5t)^2 +3])`
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