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Over the open interval (0,0.7) at what value of x is the tangent line to f horizontal
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Over the open interval (0,0.7) at what value of x is the tangent line to f horizontal

Over the open interval (0,0.7) at what value of x is the tangent line to f horizontal-example-1
User Pramod Kadam
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Since the tangent line is horizontal, the first deriv of the function is equal to 0. So you just need to set f'(x)=0, then solve for x-value and see if any is within the interval (0,0.7). That will also be your answer :))
User Alex Ponomarev
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