Graph the function f(x) = -3x^2 and draw the tangent lines to the graph at points whose x-coordinates are -2, 0, and
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Find the difference quotient (f(x + h) - f(x)) / h
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Find f'(x) by determining lim h->0 (f(x + h) - f(x)) / h
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Find f'(-2) (This slope should match the tangent line you drew above.)
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Find f'(0)
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Find f'(1)
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