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Calculate the following multi-variable limits if they exist limx,y→(2,1) xˆ2 − 2xy / xˆ2 − 4yˆ2...

Calculate the following multi-variable limits if they exist limx,y→(2,1) xˆ2 − 2xy / xˆ2 − 4yˆ2 and limx,y→(0,0) 2xˆ2 + 7yˆ2 /4yˆ2 + xˆ2

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