given two sets X={-1,0,1} and Y={u,v,x,y,z}. There are 3x(3-1)x(3-2)%36 onto mappings from X to Y. true or false

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A: Given heat equation is ∂u∂t=3∂2u∂x2,                   (1) ∂u∂x(0,t)=∂u∂x(3,t)=0 u(x,0)=3x+1   By se...