Consider the function that assigns each positive integer to its FIRST (leading) digit. (For example, the positive integer 517 gets assigned to 5).  In Blank 1: What is the domain of this function?  In Blank 2: What is the range of this function? (note I am not asking for the co-domain here) Please use either the roster method or set-builder notation for your response. In Blank 3: Is this function injective? (yes or no)

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A: Given that  if x=4,8,3,-2

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A:

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Q: In Z7, evaluate the following expressions. 3- (2 x 5) 2 × 3 × 4 5 x 3 3+4+5 3² +4² 1. 1 2. 2 3. 3 4.…

A: