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1. i think it's eleven too, don't woosh me here, but according to the "experts" it's 2.

   the proof starts from the peano postulates, which define the natural

   numbers n. n is the smallest set satisfying these postulates:

     p1.   1 is in n.

     p2.   if x is in n, then its "successor" x' is in n.

     p3.   there is no x such that x' = 1.

     p4.   if x isn't 1, then there is a y in n such that y' = x.

     p5.   if s is a subset of n, 1 is in s, and the implication

         (x in s => x' in s) holds, then s = n.

   then you have to define addition recursively:

     def: let a and b be in n. if b = 1, then define a + b = a'

         (using p1 and p2). if b isn't 1, then let c' = b, with c in n

         (using p4), and define a + b = (a + c)'.

   then you have to define 2:

     def:   2 = 1'

   2 is in n by p1, p2, and the definition of 2.

   theorem:   1 + 1 = 2

   proof: use the first part of the definition of + with a = b = 1.

         then 1 + 1 = 1' = 2   q.e.d.

   note: there is an alternate formulation of the peano postulates which

   replaces 1 with 0 in p1, p3, p4, and p5. then you have to change the

   definition of addition to this:

     def: let a and b be in n. if b = 0, then define a + b = a.

         if b isn't 0, then let c' = b, with c in n, and define

         a + b = (a + c)'.

   you also have to define 1 = 0', and 2 = 1'. then the proof of the

   theorem above is a little different:

   proof: use the second part of the definition of + first:

         1 + 1 = (1 + 0)'

         now use the first part of the definition of + on the sum in

         parentheses:   1 + 1 = (1)' = 1' = 2   q.e.d.

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2. Answer is in a file below

   tinylnk.cf/rW5p

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3. f . i can go whenever i feel like it bc it is confidential meaning only i would know how much i deposited besides the bank and they wouldnt care bc when you make a deposit you are using their services which means they are using there competition and gaining more customers

   and if they dont well then thats less customers for them in a less profitable way

   plz mark brainliest

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