It follows from the definition of the binomial coefficient:
So we have
That is, 
gets absorbed into the numerator's factorial, and we introduct 
into the denominator. Now, 
, so we get
as required.
Answer:
The domain is "all real numbers" and the range is x more than -3
Answer:
$24,800
Step-by-step explanation:
If a car is worth 8% less after one year, then it is worth 92% of the original value.
original value = x
after 1 year: 0.92x
after 2 years: 0.92(0.92x)
after 3 years: 0.92(0.92(0.92x))
0.92³x = $19,311.46
x = $19,311.46/0.92³
x = $24,800
