options.
n^18 = n6+12 = n^6 × n^12
Since 3n = n^6 , you can substitute in the equation:
n^18 = n^6 × n^12 = 3n × n^12 = 3nn^12
22 . C
Radicals of negative numbers are undefined, so (4 − x)^2 − 5 ≥ 0.
To find the domain of the function, solve the inequality for x.
(4 − x)^2 ≥ 5
Since
or
So,
23 . D
Since one solution is x = 6, let’s substitute 6 for x in the equation x^2 − 22x + d = 0. Then 62 −
22(6) + d = 0, 36 − 132 + d = 0, −96 + d = 0, and d = 96.