Mathematics - 6 December 2007

Consider the function f(x) whose second derivative is f ''(x) = 4 x + 4 \sin (x). If f(0) = 2 and f '(0) = 4, what is f(x)?

2007-12-06 04:51:34 · 2 answers · asked by Anonymous

I need to add these two fractions!

-3/(5 - a) and 5/(a^2 - 25)

I think it has to do with factoring (a^2 - 25)....

2007-12-06 04:44:51 · 6 answers · asked by Anonymous

Please Give Step By Step Instructions In Words On How You Solved It Please..Thanx..

2007-12-06 04:38:51 · 5 answers · asked by Naima 2

I came up with an explicit formula of: f(n) = 5*2^(n-1) - 3 as a solution to the recursive sequence: f(n) = 2f(n-1) + 3 for all integers n >= 2 and f(1) = 2. Is there a way to use mathematical induction to verify the "correctness" of my explicit formula?

2007-12-06 04:38:13 · 1 answers · asked by ǝɯɐuɹǝsn ɔıɹǝuǝƃ 3

x^2 -10x +5 = 0


The answer is, 5 + 2over the sum of the root of 5
--

p.s. that minus sign goes under the plus..

2007-12-06 04:36:09 · 1 answers · asked by da_mexican_05@sbcglobal.net 1

4sin^2(x/2)cos^2(x/2) = sin^2(x)

thanks a lot!

2007-12-06 04:32:28 · 3 answers · asked by Nate 6

6x^2 +15x = 9

1
The answer is -2 ----- ,but u must show the steps..
2

2007-12-06 04:31:19 · 3 answers · asked by da_mexican_05@sbcglobal.net 1

Use the First derivative test to find the critical values of y=(x^(2)-4)^7. Use the First Derivative Test to determine if there are extrema and, if so, what kind?

2007-12-06 04:27:18 · 4 answers · asked by Caramel 2

x +3y +5z = 20
y - 4z= -16
3x - 2y +9z = 36

2007-12-06 04:20:34 · 8 answers · asked by me y 1

1.) Find the slope of a line perpendicular to 4x+5y=7
a.)4/5
b.)5/4
c.)-4/5
d.)-5/4

For questions 2-4, identify wheather the lines for each pair of equations are parallel,perpendicular, or neither
2.)y=3x-1, y=-1/3x+2
a.)parallel
b.)perpendicular
c.)neither

3.)y=2x+5, 2x+y=-4
a.)parallel
b.)perpendicular
c.)neither

4.)y=-2/3x-1, 2x+3y=6
a.)parallel
b.)perpendicular
c.)neither

5.)Select the equation of the line that contains (2,1) and it is perpendicular to y=-1/2x+3
a.)y=-1/2x-3
b.)y=1/2x-3
c.)y=2x-3
d.)y=-2x-3

THANKS SOOO MUCH!

2007-12-06 04:13:20 · 5 answers · asked by jake 1

A new test is developed to test for a certain disease, giving "positive" or "negative" results to indicate that the person does or does not have the disease. For a person who actually has the disease, the test will give a positive result with probability 0.95. For a person who does not have the disease, the test will give a positive result with probability 0.05. Furthermore, only one person in 1000 actually has the disease. If a randomly selected person is given the test and tests positive, what is the probability that the person actually has the disease?

2007-12-06 04:06:55 · 5 answers · asked by Anonymous

2007-12-06 03:59:33 · 4 answers · asked by Anonymous

8.4749 x 10 (to the power of) 40:4793876 x 10(to the power of) 50
Or for those that understand the symbols: 8.4749*e40:4793876e50
I'm completely stumped!

2007-12-06 03:59:28 · 3 answers · asked by Anonymous

hi, my final is tonight and I'm trying to study up.

if cot x 3/7
and sin x < 0
evaulate cos 2x exactly

thanks a lot for any help!

2007-12-06 03:54:13 · 4 answers · asked by Nate 6

A:HAI B
B: HI
A : WAT R U DOIN?
B: I AM DOIN MATHS. IT IS BORING.
A:NO IT IS INTRESTING SUBJECT
A:LET ME SHOW SOME MAGIC ON NUMBERS
B:OK
A:& [ITS THE QUESTION] {THINK ABOUT A NUMBER. DONT TELL.MULTIPLY IT BY 2.ADD 6 TO IT.DIVIDE IT BY 2,LATER FROM THE ANSWER SUBTRACT THE NUMBER WHICH U THOUGHT 1 ST}

A: SHALLI SAY THE ANSWER?
B ; OK!
A:THE ANSWER IS 3
B: S BUT HOW

2007-12-06 03:52:48 · 6 answers · asked by Manian 2

2007-12-06 03:43:38 · 6 answers · asked by Anonymous

2007-12-06 03:43:18 · 8 answers · asked by conner 1

i know it involves cahin rule, but i can't quite figue it out

2007-12-06 03:28:48 · 2 answers · asked by Anonymous

2007-12-06 03:28:26 · 25 answers · asked by bsbookie411 1

I need to know.

2007-12-06 03:11:37 · 21 answers · asked by Guy W 1

I need to know how long a 50 lb. bag of grain feed will last if feeding 4 gallons a day.

2007-12-06 03:06:44 · 24 answers · asked by bic 3

Ms. Andrew ask her class groups to make posters for the bulletin board. She told them to draw, color, or past 42 stars on each poster board. The only rule was that the stars had to be in equal groups and the number of starss in each group had a to be prime. How many groups of stars might be on the poster, and how many stars are in each group?

2007-12-06 03:03:17 · 5 answers · asked by Lisa the Angel 1

What is the third term in the expansion of (x - 3)^7 ?

How do i solve this?

2007-12-06 03:01:56 · 5 answers · asked by Anonymous

for example like this-

5x-y=33
7x+y=51

2007-12-06 02:58:35 · 6 answers · asked by Cazzie 2

667mm
converted to feet and inches

2007-12-06 02:43:58 · 8 answers · asked by infobod2nd 4

Yn is the position at time n of a particle executing a simple random walk with partially reflecting barriers at 0 and a so that P{Yn = y +1|Yn-1 = y}= p for y = 0, 1, 2, ..,.a-1, and
P(Yn = y-1| Yn-1 = y) = q = 1- p for y 1, 2, .., .a-1, a..
Also P( Yn= a | Yn-1= a) = p and P( Yn= 0 | Yn-1= 0) = q

If П = [П0, П1, П2, . . . . Пa ] is defined to be the stationary distribution for this process

П_i=pП_(i-1)+ qП_(i+1) for i=1,2,….a-1

Show that
П_1= ((p/q)*)П_0 ,П_2=((p/q)^2)*П_0 and in general П_a=((p/q)^a)*П_0

2007-12-06 02:41:10 · 3 answers · asked by Anonymous

7. Some guy named Jim has come up with a scheme for eliminating coins. This scheme involves probability and the fact that most cash registers today are computers. Suppose that every cash register could be programmed with a random number generator; that is, suppose that it were possible to pick a random number from 1 to 99. Jim's system works as follows. Suppose you purchase items totaling $15.89. The computer would choose a number from 1 to 99 and then compare it with the cents portion of the purchase. In this case, if the random number is between 1 and 89 the price would be rounded up to $16; if it is between 90 and 99 the price would be rounded down to $15. For example, if you purchase a cup of coffee for $1.20, and the random number generator produces a random number from 1 to 20, the price is $2, but if it produces a number from 21 to 99 the price is $1. Use your problem solving skills to make several comments on this scheme.


10 points for best answer .... please help

2007-12-06 02:32:48 · 3 answers · asked by Anonymous

I know this has somthing to do with what x is going to equal to get zero but i still dont get it.

Solve: x^2-5x+6=0

a. x= 2, x= 3 c. x= 1, x= 6
b. x= -2, x= -3 d. x= -1, x= 6

2007-12-06 02:14:58 · 10 answers · asked by soulof_adragon89 1

2007-12-06 02:01:14 · 6 answers · asked by Lorraine 2

the x-2 is over the x^2-4 i know ive seen this before but cant remember to save my life.

2007-12-06 01:52:10 · 9 answers · asked by soulof_adragon89 1