Find the limit, if it exists, or show that the limit does not exist (a) lim (v) (0,0) 4+4y² U=D 15m y-20 (b) 6 =6 lim (0)-(1,0) 44² 2². 24-2² +4² 1+y² In ay ∙in (1 10²) = 1n1=0 2/

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