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1. In function y=2x2-x, if point x=1 moves to x=1.01 find Δy and dy . 2. For any value a and b show that curves x2-y2=a2 and xy=b2 are perpendicular.  

Can someone please help me with this? I'm taking this class online and it has got to be one of the worst decisions ever. I've emailed the teacher already but she sometimes takes days to reply.   http://s27...

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