04/08/16

Find the limit as x tends to -1 of(x^2 —1)/(|x|—1) algebraically
Calculus; Functions and Limits
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04/07/16

Maths Vectors Question
Show that, for all vectors, u and v, |u x v|^2 = |u|2|v|2 - |u.v|2
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04/05/16

Help with probability
A fair die is rolled and a fair coin is tossed. The random variable X is defined as the number obtained on the die minus the number of heads (0 or 1) resulting on the coin. Calculate and write down... more
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04/04/16

Find the truth value of the statement.
If p is true, q is false, and r is true, find the truth value of the statement.     (r→∼p) Λ (q→∼r)
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04/04/16

Find area of parallelogram
Verify that the points are the vertices of a parallelogram and then find its area. (2,-1,1),(5,1,4),(0,1,1),(3,3,4).
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04/04/16

Find a power series representation for the following:
Find a power series representation for the following:   3x / (2 - x) , centered at 1
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04/03/16

derivative?
what is the derivative of the following? (begin square root sign) cos(7n) (end square root sign) - arctan(2n)   thanks in advance
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04/03/16

How large of a sample is required to estimate the mean usage of electricity?
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. They would like the estimate to have a maximum error of 0.15 kWh. A... more
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04/03/16

find the point on the plane
find the point on the plane 20x+15y+12z = 120 that is closest to the sphere x^2+y^2+z^2=1
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04/03/16

Solve the multiple angle equation
Sec 8x=2 
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04/03/16

Use inverse functions
2 cos^2 x +7 sin x =5
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04/03/16

Use inverse functions
2sin^2 x+11 cos x=7
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04/02/16

Let f (x)= the integral from -2 to x^(2)-3x of e^(t)^(2) dt. At what values of x is f (x) a minimum?
I need help. Thanks.
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04/02/16

Sequence and series
If n     i     jΣ    Σ    Σ 1= 220i=1 j=1 k=1   Then find the value of n
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04/02/16

How do I know if my SSA triangle has more than one set of answers?
Solve the triangle using the law of sines: a = 75 b = 100 c = ?   <A = 30° <B = ? <C =?   My work: Sin B / 100 = sin 30 / 75 Sin B = (100 * sin(30°))/75 Sin B = .6667 Sin-1... more
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04/02/16

Simplify:(5x^3-3x+1)÷(x-2)
Simplify:(5x3−3x+1)÷(x−2)
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04/02/16

limit [(n!)^1/n]/n as n->infinity.....answer is 1/e; how ??
 question is of jee exams; of calulus. it can be solved by puiseux series. but finding a better method.
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04/01/16

Trees [What is the minimum possible depth of T]
I just wanna know how can i get the min with certain number of nodes. Who can explain how to find the min      Consider a binary search tree T with 5 nodes. What is the minimum possible depth... more
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03/31/16

Use Cramer's rule to solve the system {5x+2y-z=-7 and x-2y+2z=0 and 3y+z=17
Use Cramer's rule to solve the system {5x+2y-z=-7 and x-2y+2z=0 and 3y+z=17
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03/31/16

Use Cramer's rule to show the system of equation :{4x+5y=13 and 3x+y=-4
Use Cramer's rule to show the system of equation: {4x+5y=13 and 3x+y=-4
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03/31/16

Algebraic Expressions, I need help!
the volume of box is represented by: V= X³ + 3x² -34x -120. The width is (x - 4) inches. Find an algebraic expression for the other 2 dimensions. The height is greater than the length.
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03/30/16

Standard Deviation
Consider a nationally recognized standardized college admissions test with scores that are normally distributed, centered at a mean of 21, and have a standard deviation of 4.5. Use the 68-95-99.7... more
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03/29/16

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x?8 (1+2/x)^x
I need detailed solution with working shown
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03/28/16

Use the following data: 11, 14, 15, 19, 10. What's the standard deviation?
Use the following data: 11, 14, 15, 19, 10. What's the standard deviation?
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03/27/16

Probability Question
According to an airline report roughly 1 piece of luggage out of every 200 that are checked are lost. Suppose that a frequently flying businesswoman will be checking 120 bags over the course of the... more
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