y3−712y−7216
This is part of Cardano's method, so I've gotten my first root to be:
y1=3√7432+i√496912+3√7432−i√496912
I am at a loss on how to evaluate this. I know this is one of three real roots, but I don't know what to do now.
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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