Dear, Math-talent!
The slope of the tangent line to the graph of the function y=3x^3 at the point (381) is limx=>3 (3x^3−81)/(x-3.) By trying values of x near 3, find the slope of the tangent line

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Take you calculator and try x=2.9, 2.99, 2.999, to get a good idea where this is going to...

ok,Thank you. I have a calculator with me.. but why x=2.9??

oh i get it beacuse its near 3....

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