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