Question

y=-x^2+5x+6 vertex?

Answer 1

Vertex means the lowest point?

Answer 2

or the highest pt

Answer 3

the minimum or maximum point..
maximum in this case

Answer 4

so it will be (-b/2a, -D/4a)

Answer 5

or you can just apply d/dx

Answer 6

-2x + 5 = 0
x = 5/2

Answer 7

can we differentiate it?

Answer 8

the problem is im getting 49/4 when x=5/2 and my book says the answer is 29/4... no differentiation

Answer 9

so it will be (-b/2a, -D/4a).how?

Answer 10

hmm...-(5/2)^2 + 25/2 + 6
= -25/4+25/2+6
= 25/4 + 6
=49/4, you're right!

Answer 11

y=-(5/2)^2+5(5/2)+6

y = -25/4 + 25/2 +6......... yup

Answer 12

See: do you know differentiation?

Answer 13

ya very well.

Answer 14

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

Answer 15

-D/4a?how?

Answer 16

See: did u get y i differentiated?

Answer 17

plz tell me the reasion?

Answer 18

ok when we differentiate, we get the eqn of the slopes of that eqn on respective pts

Answer 19

why we want to know slope?

Answer 20

tell me what you know about derivative at a pt?

Answer 21

i have done intermediate level

Answer 22

ok. its the limiting secant to the graph, the tangent!

Answer 23

bec of tangent we differentiate ya?

Answer 24

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!

Answer 25

ok thanks amogh

Answer 26

So you understand why we equate the slope to 0?

Answer 27

actually iam not intouch.

Answer 28

hmm...np was i clear enough?

Answer 29

thanks alot amogh

Answer 30

LOL, I'm askin you did u understood wat i said now?

Answer 31

or i was too fast or slow?

Answer 32

u was splended amogh

Answer 33

Determine the vertex of the given equation.
y = x2 + 9? im Haveing trouble.

Answer 34

x^2