Find the difference: x+1/x-1 - x-8/x-1 a) 9/x-1 b) 2x-7/x-1 c) -7/x-1 d) 2x+9/x-1

Option 1st is correct

Step-by-step explanation:

To find the difference of :

Since, the denominator are same.

⇒LCM = x -1

then;

⇒

Combine like terms;

⇒

Therefore, the difference of is,

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )