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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 hap...

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 lear...

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...

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 +...

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. ...