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How do I know when I should be using the Poisson distribution?

To identify a Poisson distribution question, remember that in a Poisson distribution... Events occur independently of each other Events occur at a constant rate Events occur singly (that is, two can't happen...
HD
3419 Views

Why does matrix multiplication seem so unintuitive and weird?!

You're right, when you first learn about matrix multiplication it definitely doesn't feel like the easiest way of defining a form of multiplication. This is particularly true if you've just learned about add...
DC
19297 Views

A curve has equation y=(2-x)(1+x)+3, A line passes through the point (2,3) and the curve at a point with x coordinate 2+h. Find the gradient of the line. Then use that answer to find the gradient of the curve at (2,3), stating the value of the gradient

The gradient of the line is given by change in Y divided by change in X. To find the Y value of the point we must put 2+h into the y=(2-x)(1+x)+3. Doing this we get y=(2-(2+h))(1+(2+h))+3=(-h)(3+h)+3= -3h -h...
JC
3435 Views

Solve the following, giving your answers in terms of ln a: 7 sechx - tanhx =5

7sechx - tanhx = 5 7/coshx - sinhx/coshx = 5 7 - sinhx = 5 cosh x 7 - 0.5(e x - e -x ) = 2.5(e x + e -x ) 7 -0.5e x + 0.5e -x = 2.5e x + 2.5e -x 0 = 3e x - 7 + 2e -x 0 = 3e 2x - 7e x + 2 0 = (3e x - 1)(e x -...
AW
8215 Views

How would go about finding the set of values of x for which x+4 > 4 / (x+1)?

Whenever you see a problem involving an inequality (greater than or less than sign) it is really important to pause for a second before you go breaking any rules of mathematics. Inequalities do not always be...
TH
2983 Views