For each of the following determine the points at which the function is not analytic: 1) 1/z - 4 + 5i.
2) iz^3 + 2z/z^2 + 1.
3) 3z - 1/z^2 + z + 6.
4) z^2 (5z^2 - 6z + 1)^-2.

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible