Answer:
f (-3) = 45
Step-by-step explanation:
f (x) =
f (-3) =
=》
=》
In the first digit, there are 6 possibilities. In the second, there are 5, because you can't use the digit you used before. In the third, there are 4, and in the fourth, there are 3. So,
6*5*4*3=360
There are 360 different possible four-digit numbers
The number of permutations of the 4 different letters, taken two at a time, is given by:
Answer:
3+5=5+3
Step-by-step explanation:
Because the commutative property means 'flip-flop'
Hope this helps! = )
