07/28/13

Find the general solution?
Find the general solution of x^2*y"+4xy'+2y=0 that is valid in any interval not including the singular point. Answer:... more
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04/08/13

Show that the limit does not exist?
Show that lim (x, y)-->(0, 0) (3x^2(y))/(x^4+y^2) does not exist.
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04/08/13

cos2(x)-cos6(x)=0
find the solutions of the equation in the interval [0, 2pi)
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04/03/13

sin(2x)+cos(3x)=0
solving between [0,2Π]
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04/03/13

Find all points where f(x, y)=4xy+sin3x^2*y is continuous.
Find all points where f(x, y)=4xy+sin3x^2*y is continuous. The answer is All x, y. But how to get there?
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03/28/13

is there an elementary proof that if two angle bisectors in a triangle are congruent, then the triangle is isosceles?
(The converse is easy.)
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03/27/13

Find the flux of F over Q where Q is bounded?
Find the flux of F over Q where Q is bounded by 3x+2y+z=6 and the coordinate planes, F=<y^2*x, 4x^2*sin(z), 3>. (Answer: 27/5). The divergence of the vector field is y^2, which is what I've... more
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03/26/13

Find the flux of F over Q where Q is bounded?
Find the flux of F over Q where Q is bounded by z=sqrt(x^2+y^2), x^2+y^2=1 and z=0, F=<y^2, x^2*z, z^2>. (Answer: pi/2) The divergence of the vector field is 2z, which is what I've found.... more
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02/10/13

(x+7)/(x-1) is less than or equal to 0
solve the rational inequality. express the solution using interval notation. (x+7)/(x-1) is less than or equal to 0
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01/29/13

give the answer in 5 second!
let x=(1000000000000000000001)20 then, under root x2+x is equal to what?   only for genius !
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01/27/13

how you could use Descartes' rule and the Fundamental Theorem to predict the number of complex roots to a poly
How could you use Descartes' rule and the Fundamental Theorem of Algebra to predict the number of complex roots to a polynomial as well as find the number of possible positive and negative real... more
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01/24/13

What is the distance between the points 6, -7) and (1, 5)?
It's homework
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01/24/13

Is glass a liquid?
Someone please help with this question for my chemistry class. Is glass a liquid? 
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01/24/13

Solve the following system of equations by the substitution method.x - y = 0x - y - 2 = 0What is the solution set?
Solve the following system of equations by the substitution method. x - y = 0 x - y - 2 = 0 What is the solution set?
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01/24/13

pascal behavior (a+b)6
pascal behavior (a+b)6
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01/23/13

Whats 12 = -1x + 1 ? And how to solve it?
So we have been having algebra for some time now and i don't really understand how to solve them cause i never understand the teacher. sorry for my bad english :/ im swedish and im 14 :)
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01/22/13

Composition question
If f(0)=1, f'(0)=2, g(0)=3, g'(0)=4 what is (f^2•g)'(0) 
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01/19/13

Find the domain and codomain and determine whether T is linear
w1=5x1-x2+x3 w2= -x1+x2+7x3 w3= 2x1-4x2-x3 My solution so far: From the system I can tell that it is R3, so domain is R3, since there w1, w2, w3 I can tell that codomain is R3. Is there a way to... more
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01/07/13

integral 1/(sin(x)+cos(x))
help with a calculus question
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12/30/12

Consider f(x)=x^2/x^2+a, a>0. Determine the effect on the graph of f if a is varied?
consider f(x)=x^2/x^2+a, a>0. Determine the effect on the graph of f if a is varied Does this mean that... A) Each y value is multiplied by a B) As a increases, the vertical tangent lines move... more
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12/18/12

proof by stokes theorem
use stokes theorem to evaluate F*dR where F(x,y,z)= xyi+x^2j+z^2k and C is the intersection of paraboloid z=x^2+y^2 with plane z=y with counterclockwise orientation looking down the positive z axis.
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12/03/12

solve using the square root property
x^2+216=0 I am having problems finishing this equation, I end up with x= + or - the square root of 216. Can anybody help?
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08/27/12

how do I factor a trinomial that has a value greater than 1 in the x squared term?
the problem is:   4x^2 + 12x + 9
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