Question):-  Equation of a travelling wave is y = $5e^{\left(-a{x}^2-b{t}^2-2\sqrt{abxt}\right)}$ where x and y are in meter and t is in sec.  a=25 m^-2 and b = 9 sec^-2
1.  Travelling wave propagates along (+) $\times$ direction.
2.  Travelling wave propagates along (-) $\times$ direction.
3.  Speed of wave is $\frac{3}{5}$ m/sec.
4. Maximum  displacement of particle is 5m.