Mathematics
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OpenStudy (kayders1997):
Let a function g be defined by g(x)=2x^2-3x+10 find g'(x) when g(x)=15
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OpenStudy (kayders1997):
So 2x^2-3x+10=15? Solve for x?
OpenStudy (caozeyuan):
Yes
OpenStudy (kayders1997):
I'm just confused thought because you get more than 1 point? Is that ok?
OpenStudy (caozeyuan):
Of ccause, and their sloe should be direct opposite
OpenStudy (caozeyuan):
sorry, slope, my typo
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OpenStudy (caozeyuan):
becuase you are looking at a quartic equation
OpenStudy (caozeyuan):
|dw:1473994044572:dw|
OpenStudy (kayders1997):
Ok let me try it out and see what I get
OpenStudy (caozeyuan):
baddrawing but you get the idea
OpenStudy (kayders1997):
Ok so after factoring I got x=5/2 and x=-1
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OpenStudy (zzr0ck3r):
plug those into the derivative
OpenStudy (kayders1997):
So I got g'(5/2)=7 and g'(1)=-7
OpenStudy (caozeyuan):
see, thats exactly what Im talking about
OpenStudy (kayders1997):
Yes, that totally made sense when you interpreted it with a graph
OpenStudy (kayders1997):
Thank you so much :)
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OpenStudy (caozeyuan):
no problem, now Im going to sleep before my head hits my keyboards;dl'fmceiksd'icmmkal'sklaskdnrfsow'kqd012
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OpenStudy (kayders1997):
Lol goodnoght!