ta123
need help on the attachment
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ta123
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anonymous
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was the last answer wrong?
hoda
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hkd
d
d
d
d
d
d
dddddd
i
ta123
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I'm nut sure but did you check all the graphs to make sure your first answer was correct
ta123
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oops! I misspelled not to nut,
ta123
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satellite where you at?
anonymous
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i only saw three graphs. are there more?
ta123
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yes
ta123
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there 5 graphs to choose from
hoda
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hi
anonymous
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ok it is still b i think
anonymous
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you know that the second derivative is always positive. this tells you that the function is always concave up
anonymous
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4 and 5 both have parts that are concave down. so they are out as well.
ta123
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anonymous
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yeah i see them now. 3, 4, 5 all have parts that are concave down, but you are told that
\[f''(x)>0\] for all x not equal 0, so your function must be concave up
anonymous
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only 1 and 2 are always concave up, so it has to be the second one for the reason i stated earlier
ta123
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Thanks I could you help me on a similar problem dealing with finding the relative minimum on a graph
ta123
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GoBlue
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Relative min is where the function changes from decreasing to increasing, or where the derivative changes from negative to positive.
ta123
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correct