Question: How do I construct sign charts for these problems i) Write f'(x) sign chart for f (x) ; ii) Use (i) to sketch a graph

How do I construct sign charts for these problems

i) Write f'(x) sign chart for f (x) ; ii) Use (i) to sketch a graph of f . a) f'(x) = -4(x-2)(x+6) b) f'(x)=-15(x+1)2(x-31)3
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