So nx = nn−1. Dividing both sides by n gets you Remember that you must
subtract exponents when dividing powers. Since the exponent of n is 1, you subtract that
value from n − 1.16 . D
is the sum of two fractions, .
Each of these can be simplified:So 17 . C
Any fraction with a denominator equal to 0 has an undefined value. So the domain of f(x)
includes numbers such that |x| − x ≠ 0. If x ≥ 0 , then |x| − x = x − x = 0.
If x < 0, |x| − x = −x − x = −2x. So the domain of f(x) includes all real numbers less than 0.18 . C
The diagonals of a square intersect at their midpoints. To find the point of intersection, find
the midpoint of one of the diagonals. Take the points (4,5) and (12,−3):