Question

Which of the following is not a function?

(a) : ℕ → ℕ ∪ {0}, () = last digit of n, ∈ ℕ

(b) : ℕ → ℕ ∪ {0}, () = sum of digits of n, ∈ ℕ

(c) : ℕ → ℕ ∪ {0}, () = number of digits of n, ∈ ℕ

(d) : ℕ → ℕ ∪ {0}, () = − 1 , ∈ ℕ​

Answer 1

Answer:

zbbzbznzmmLlalzkz

Step-by-step explanation:

nznzbznzzaja

Answer 2

Answer:

d) : N → N U {0} , () = - 1 , € N

is your right answer

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