anonymous
  • anonymous
y=-x^2+5x+6 vertex?
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Vertex means the lowest point?
anonymous
  • anonymous
or the highest pt
anonymous
  • anonymous
the minimum or maximum point.. maximum in this case

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anonymous
  • anonymous
so it will be (-b/2a, -D/4a)
anonymous
  • anonymous
or you can just apply d/dx
anonymous
  • anonymous
-2x + 5 = 0 x = 5/2
anonymous
  • anonymous
can we differentiate it?
anonymous
  • anonymous
the problem is im getting 49/4 when x=5/2 and my book says the answer is 29/4... no differentiation
anonymous
  • anonymous
so it will be (-b/2a, -D/4a).how?
anonymous
  • anonymous
hmm...-(5/2)^2 + 25/2 + 6 = -25/4+25/2+6 = 25/4 + 6 =49/4, you're right!
amistre64
  • amistre64
y=-(5/2)^2+5(5/2)+6 y = -25/4 + 25/2 +6......... yup
anonymous
  • anonymous
See: do you know differentiation?
anonymous
  • anonymous
ya very well.
anonymous
  • anonymous
Ok. so when you differentiate ax^2+bx+c and equate it to 0, you get -b/2a Putting this in fn: you get -D/4a
anonymous
  • anonymous
-D/4a?how?
anonymous
  • anonymous
See: did u get y i differentiated?
anonymous
  • anonymous
plz tell me the reasion?
anonymous
  • anonymous
ok when we differentiate, we get the eqn of the slopes of that eqn on respective pts
anonymous
  • anonymous
why we want to know slope?
anonymous
  • anonymous
tell me what you know about derivative at a pt?
anonymous
  • anonymous
i have done intermediate level
anonymous
  • anonymous
ok. its the limiting secant to the graph, the tangent!
anonymous
  • anonymous
bec of tangent we differentiate ya?
anonymous
  • anonymous
not actually, derivative is also the rate, you can say, See the more slope a pt has, wouldn't it turn more? What I mean is if it has more slope it will increase faster!
anonymous
  • anonymous
ok thanks amogh
anonymous
  • anonymous
So you understand why we equate the slope to 0?
anonymous
  • anonymous
actually iam not intouch.
anonymous
  • anonymous
hmm...np was i clear enough?
anonymous
  • anonymous
thanks alot amogh
anonymous
  • anonymous
LOL, I'm askin you did u understood wat i said now?
anonymous
  • anonymous
or i was too fast or slow?
anonymous
  • anonymous
u was splended amogh
anonymous
  • anonymous
Determine the vertex of the given equation. y = x2 + 9? im Haveing trouble.
anonymous
  • anonymous
x^2

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