Question: (Sections 4.3,4.4,4.5)Determine whether the following limits exist. If you suspect that a limit does not exist, try to prove so by using limits along curves.

(Sections 4.3,4.4,4.5)Determine whether the following limits exist. If you suspect that a limit does not exist, try to prove so by using limits along curves. If you suspect that the limit does exist, you must use the lon- definition, or the limit laws, or a combination of the two.(a)lim(x,y)(0,0)sin(x+y)x+y(b)lim(x,y)(1,1)y+1x-1(c)lim(x,y)(0,0)x2+y2xy(d)lim(x,y)(2,2)cosxsiny+ytanx

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