anonymous
  • anonymous
[9.01] Determine whether the graph of y = −5x2 + 3x + 8 opens up or down and whether it has a maximum or minimum point.
Mathematics
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schrodinger
  • schrodinger
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anonymous
  • anonymous
a graph is concave downwards when it has a maxima and concave upward when it has a minima|dw:1435251272624:dw|
anonymous
  • anonymous
at either maxima or minima , the slope of the curve is zero, so dy/dx=0 |dw:1435251358155:dw|
anonymous
  • anonymous
to find whether it is maxima or minima , use double derivative it is maxima when when double derivative <0, and hence the curve will be concave downwards. it is minima when double derivative>0, and hence the curve will be concave upwards

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anonymous
  • anonymous
that didn't help at all :)

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