Mathematics - 19 June 2007

Hi guys i am in precalc but i am having trouble solving an equation like e^ (1+lnx)
your earliest response is appreciated...
please help!!!!

2007-06-19 08:57:12 · 8 answers · asked by Anonymous

Can someone explain exactly how to do this so I can get a complete understanding and do it myself next time?

2007-06-19 08:49:07 · 4 answers · asked by Anonymous

2007-06-19 08:43:43 · 5 answers · asked by Jessi 3

Ok, I'm trying to teach myself linear algebra and having trouble understanding some the concepts...

If V is a subspace of, say R^3, then thats a collection of all vectors in some plane or some line going through the origin, correct? Then if we take the span of V, which a set of all linear combinations of the vectors in V, wouldn't that just give us the same plane or line?

2007-06-19 08:42:02 · 3 answers · asked by tzz1985 2

i'm stuck on this math problem i need some help

2007-06-19 08:37:53 · 9 answers · asked by woodybostic 1

2007-06-19 08:30:28 · 33 answers · asked by Anonymous

(The *s means "squared"). The equation of the circle with center O(0,0) is x*2 + y*2=40. The points A(-2, 6) and B (-6, -2) are endpoints of chord AB. DE right bisects chord AB at F.

a) Verify that the center of the circle lies on the right bisector of chord AB

b)Find the distance from the center of the circle to chord AB, to the nearest tenth.

2007-06-19 08:26:16 · 5 answers · asked by The_Executioner 2

THANKS!!!

2007-06-19 08:23:32 · 5 answers · asked by Anonymous

2007-06-19 08:18:56 · 25 answers · asked by Anonymous

I totally got stuck at this calculus assignment again. :(
Need some help from you guys again. :)
So I have to find and explicitly express a function that is continuous and increasing in its all real number domain, it has to be bounded, but not differentiable. I thought about y = |x|, but it's not bounded, and half of its part is decreasing. Any idea guys?
another question is if f(x) = (x^3)cos(1/x) where x does not equal to 0, and f(x) is also equal to 0 (a point itself).
is this function f(x) differentiable, continuous, monotonic, bounded, and integrable on the interval [-1,1]?
f(x) = | (x^3)cos(1/x) x does not equal to 0
| 0
hope i made this question look clear enough. :(
Thanks in advance

2007-06-19 08:17:41 · 2 answers · asked by Guns N' Roses 1

2007-06-19 08:13:13 · 5 answers · asked by Justin D 1

need help with this.. math problem?

2007-06-19 07:57:53 · 24 answers · asked by The Sun's Competition. 2

-5 < 3-4x < 19

I keep coming up the same wrong answer ! The right answer is (-4, 2). Don't know what I'm doing wrong !

2007-06-19 07:50:46 · 7 answers · asked by dishbaby2003 1

2007-06-19 07:47:58 · 5 answers · asked by whizz 1

good luck!!!

2007-06-19 07:38:56 · 10 answers · asked by qwerty 2

need 2 no dis

2007-06-19 07:37:11 · 3 answers · asked by Andrew M 2

(n+2(3^n)+3(2^n)) / (n^2-5(2^n)+4(3^n)) for n+1,2,.....

2007-06-19 07:28:51 · 5 answers · asked by mini_dilligaf 1

The answer contains an imaginary number and I have the answer, but I do not know how to get to that answer. Solution:
x= 2 +/- imaginary # multiplied by the Square root of 6

2007-06-19 07:26:37 · 12 answers · asked by JP 1

2007-06-19 07:13:55 · 18 answers · asked by Anonymous

if a^2+b^2+c^2=16 nd ab+bc+ca=10 thn find the value ofa+b+c
2] convert the folowing decimal no in the form of p/q bust5.2......,23.43......,o.32......,o.123,0.235
3] if 27^x=9/3^x then find the value of x
4] show that x^a [b-c]/x^b [a-c]divided [x^b/x^a]^c=1
5] simplyfy underroot 5+under root 3/under root 5-under root 3+under root 5-under root 3
6] show that [x^a x^bx^c]^4

2007-06-19 07:07:41 · 8 answers · asked by Anonymous

2007-06-19 06:47:56 · 17 answers · asked by Mike3st 2

find the mistake kindov problem.

(x+1)(x-1)-(x+1)(x+2) -3
---------------------------- = -----
(x+1)(x-7) x-7

i know the answer wasnt a so i didnt post that one. if it also wouldnt be a problem could you explain why thats the right answer.

B After the polynomials are multiplied, they must be simplified, so the answer should be -1
---
x-7

C The polynomials should be multiplied, so the answer should be
(x^2-1)-(x^2+3x+2)
-------------------------
x^2-6x-7

D (x - 1) and (x + 2) cannot be combined after canceling the (x + 1) terms, so the answer should be
(x-1)-(x+2)
-------------
x-7

E The expression cannot be simplified.
F This solution is correct.

2007-06-19 06:44:14 · 1 answers · asked by Anonymous

I can't recall some rules about x. I know x = 1. So is x-1= 0?

2007-06-19 06:26:44 · 9 answers · asked by Anonymous

Consider the equation xz^2 − 6yz − 2 ln z = −6 as
defining z implicitly as a function of x and y. The
values of ∂z/∂x and ∂z/∂y at (0,1,1) are:

2007-06-19 06:20:16 · 2 answers · asked by merfie 2

Solve each inequality:
x2 - 7x + 12 < 0

3x2 + 5X -12 > 0

3x2 - 5x -12 <_ 0

How would I solve these? The numbers after the "x"s in all 3 questions are exponents. The last question is Greater Than or Equal to Zero. How do I figure these out?

2007-06-19 06:16:53 · 5 answers · asked by Sixteen and Oh 5

solve show work

2007-06-19 05:56:22 · 7 answers · asked by Biggg 3

here it is... Which radioactive isotope will retain only (1/8) its original radioactive atoms after approximately 43 days?

the formulas used ffor this are as follows: fraction remaining= (1/2) t/ T..
t= total time elapsed. T= half life.
and number of half life periods: t/T .. these formulas are off a referance table.
the answer to this question is phosphorus - 32 which has a half life of 14.3 days. .. the explanation in the back is terrible; all it says is ...
(1/2) t/T = 1/8....... t/T= three half lives.... i just dont understand how to arrive at threee half lives. if i would have gotten that then i would have been able to do the rest.. i was looking at this question aimlessly ffor like ten minutes..helpp'thankss =D

2007-06-19 05:52:30 · 6 answers · asked by luhb u much!! 4

if the polynomial x^4-6x^3+16x^2-25x+10 is divided by another polynomial x^2-2x+k,the remainder comes out to be x+a,find k and a.

2007-06-19 05:29:15 · 4 answers · asked by guggi 2

An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1,000. A random sample of 50 individuals resulted in an average income of $15,000. What is the width of the 90% confidence interval?

2007-06-19 05:29:03 · 5 answers · asked by LG 1

Determine how many gallons of a 29% solution of the same acid have to be added to the
two hundred gallons to achieve this effect.

2007-06-19 05:28:45 · 2 answers · asked by Lregofins34 2