Science & Mathematics - 27 January 2007

I need to know when the function is increasing/decreasing and when relative maxima and minima occur, without sketching the graph. I know you do this by finding the derivative and setting it to equal zero, however I am not getting proper x values. Here are the fuctions I need help with:

Relative Extrema:
1) y = x^3-6x^2 + 12x - 6

2) y= 3x/2x+5

3) y= xlnx

Absolue Extrema:
4) f(x) = x ^4/3, [-8,8]

Thank you.

2007-01-27 19:41:06 · 1 answers · asked by r 1 in Mathematics

2007-01-27 19:32:52 · 1 answers · asked by Anonymous in Chemistry

If three resistors are placed in parallel branches and powered by a 12-volt battery, then the voltage drop across each one of the three resistors is 12 volts. A charge flowing through the circuit would only encounter one of these three resistors and thus encounter a single voltage drop of 12 volts.

if it flows in only one branch how come all the bulbs have lit up?

2007-01-27 19:27:22 · 5 answers · asked by catty 4 in Physics

2007-01-27 19:24:49 · 5 answers · asked by pepper_harry 1 in Biology

i can't really understand parthenocarpy. How do these kind of fruits develop, and how could they reproduce without seeds. I don't understand the concept of spores either. So far, they're the only structures I know for asexual reproduction. Does this relate to parthenocarpy? Please, help. Thank you very much... I will appreciate if you give an answer and an explanation why, of course.

2007-01-27 19:24:35 · 2 answers · asked by Eloise 2 in Botany

2007-01-27 19:19:16 · 4 answers · asked by pepper_harry 1 in Biology

how can i solve this problem...what is the answer and solution..please help me..

2007-01-27 19:16:05 · 4 answers · asked by orange_soda 2 in Mathematics

x + y = 1

I tried to ask my republican friends to help but they can't figure it out as well.

2007-01-27 19:15:26 · 12 answers · asked by ARMCHAIR WARRIOR 2 in Mathematics

2007-01-27 19:14:44 · 3 answers · asked by Manoj K 1 in Physics

Either acentric and dicentric chromosomes is the resultant chromosome of a reciprocal translocation of chromosome. I need a detailed information for these. Anyone can help?

2007-01-27 19:10:41 · 4 answers · asked by Anonymous in Biology

2007-01-27 19:09:57 · 39 answers · asked by Anonymous in Weather

If the sun where to quit shining tomorrow what will happen? Would another star takes its place?

2007-01-27 19:06:28 · 14 answers · asked by Rachel K 1 in Astronomy & Space

2007-01-27 19:02:38 · 11 answers · asked by angel 1 in Weather

What observations did Darwin make during his time on the Galapagos Islands?

What did Darwin infer about how things may have evolved from his observations of life on the Galapagos Islands?

2007-01-27 19:02:33 · 2 answers · asked by tothethirdworld 1 in Biology

In an insulated vessel, 250g of ice at 0 degC is added to 600g of water at 18 degC.

a) What is the final temperature of the system?
b) How much ice remains when the system reaches equilibrium?

For a, the correct answer is 0 degC, however I got a final temperature of 15.1 degC. I do not understand how 0 degC was achieved.

2007-01-27 19:01:53 · 1 answers · asked by Anonymous in Physics

I tried working this out a few times...couldn't seem to get the answer! Can anyone try it out for me?

A 42.5-kg chair is attached to a spring and allowed to oscillate. When the chair is empty the chair takes 1.30 s to make one complete vibration. But with a person sitting in it, with her feet off the floor, the chair now takes 2.54 s for one cycle.

What is the mass of the person?

2007-01-27 19:00:39 · 3 answers · asked by Anonymous in Physics

Say you roll a 6-6 on your first roll. What is the probabilty that by the end of your turn (the next two rolls) you will have acheived a Yahtzee?

2007-01-27 19:00:04 · 5 answers · asked by truethirteen 2 in Mathematics

Which of the following statements is true (T) or false (F):
(a) All real processes are irreversible
(b) In an irreversible cyclical process, the system returns to its original state, but the universe does not.
(c) All spontaneous processes increase the disorder of the system

2007-01-27 18:59:52 · 2 answers · asked by You6789 1 in Chemistry

Will time travel ever be invented? (Or has it already been invented?)

2007-01-27 18:56:52 · 12 answers · asked by joshuademex 1 in Astronomy & Space

2007-01-27 18:56:12 · 17 answers · asked by angel 1 in Weather

2007-01-27 18:52:42 · 22 answers · asked by Anonymous in Weather

what will be
1:effect on the surface of earth
2:wat damage it would cause
3:will it be felt like a light earthquake or it will produce waves and ripples on the surface of the earth..

2007-01-27 18:47:47 · 7 answers · asked by hassanscence 1 in Earth Sciences & Geology

List it down or suggest a site, please.

thanks soo much

2007-01-27 18:46:08 · 3 answers · asked by huda 1 in Earth Sciences & Geology

Find the maximum latitude from which it can be seen from earth.

2007-01-27 18:45:14 · 4 answers · asked by Pritam 1 in Astronomy & Space

what is the limiting reactant?

2007-01-27 18:40:54 · 3 answers · asked by Anonymous in Chemistry

2007-01-27 18:34:21 · 4 answers · asked by .nicole. 1 in Weather

in industry

2007-01-27 18:28:41 · 3 answers · asked by Anonymous in Engineering

I thought they were the same thing, but it's not according to my teacher. So, what is the difference anyways? I'm confused

2007-01-27 18:28:14 · 3 answers · asked by bananapuddin 1 in Biology

I am learning how to solve range in school, and I am having a lot of difficulty learning how to do so. I have two problems that I have to show work for, but somehow, I keep getting the wrong answers:

radical (4 - x^2) FIND RANGE

I keep getting (- infinity, 2] when the answer is supposed to be [2, infinity)

WHAT AM I DOING WRONG?

I can't get this one either: radical (x^2 + 4). Here the answer is [2, infinity)

Please help

2007-01-27 18:25:56 · 6 answers · asked by Anonymous in Mathematics

2007-01-27 18:24:33 · 6 answers · asked by jamoo 1 in Physics