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The amplitude of wave disturbance propag...

The amplitude of wave disturbance propagating in the positive x-direction is given by `y=(1)/((1+x)^(2))` at time t=0 and `y=(1)/(1+(x-2)^(2))` at t=1s, where x and y are in metres. The shape of wave does not change during the propagation. The velocity of the wave will be ____m/s.

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