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#1 Help Me ! » Help with some calculus » 2008-09-10 18:08:21

jigbobber
Replies: 3

1.
a) Find the equation of the tangent to the curve

at the point where

b)the tangent in a) cuts the x-axis at
and the y-axis at
. Locate these points.
c)Find the area of the triangle

2.
Find the equation of the normal to the curve
at the point
. write this equation in general form.
3.
Let

a) find


b)find d^2y/dx^2, and show that (d^2y/dx^2)-b^2y=0
c)deduce an expression for d^ny/dx^n in terms of y

any help would be appreciated, thanks

#3 Re: Help Me ! » need help with a few problems » 2008-08-30 02:11:16

anyone know how to do question 3 ,really need some help on it

#4 Re: Help Me ! » need help with a few problems » 2008-08-29 04:58:59

thanks for the help and also explaining clearly, really has helped.

anyone know how to do question 3?

#6 Help Me ! » need help with a few problems » 2008-08-26 21:11:47

jigbobber
Replies: 14

1.The height of a child t years after birth is given by the formula

a) Find an expression for the rate at which the child grows.
b)show that

and state the significance of the result.

2.solve

3.
e6c1075fcd.jpg

a)show that


b)Show that the total area of the can be expressed by the formula

c)Find the value of
when the area is a maximum

thanks if you can help

#8 Re: Help Me ! » need more help =( » 2008-08-13 11:56:02

ah ok cheers for the help. any idea what to do with 3?

#9 Help Me ! » need more help =( » 2008-08-13 02:55:29

jigbobber
Replies: 6

having more trouble with these..

1.Find the intercepts, asymptotes, stationary points and sketch the graph

2.show algebraically that

is a tangent to the curve

3. Find the value of a if the tangent to

at
passes through the origin

thanks if you can help again.

use to be able to do these but they're revision from the start of the year and im having trouble remembering sad

#10 Re: Help Me ! » help...having trouble » 2008-08-13 02:35:15

thanks for the fast reply mathsyperson. you really helped. up

#11 Help Me ! » help...having trouble » 2008-08-13 01:25:51

jigbobber
Replies: 2

solve for x:

also this one

find the greatest and least value of

for -5≤x≤3

dunno

edit:found another confusing me..

if

show that
for all real x

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