Questions asked by Juliana R.

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• How I can to continue this limit #\lim_{xto0^+}\frac{1}{x}-\frac{1}{x^2}#??
  
• I don't know how this happen!!! Help me in fatorial?
  
• #a^(n+1) - b^(n+1) = (a-b)(a^n+a^(n-1)b+....+ab^(n-1)+b^n)# How I do get this result using induction???
  
• How I finish this proof using the definition of limit for this #lim_(x to 2) (-1/(x-2)^2) =-\infty #?
  
• My proof for this limit using the definition is correct? #lim to 2^+ (1/(x-2)) = +\infty#
  
• What is the remainder of #p| 12^(p-1)#, when p is prime?
  
• What is the #GDC(2^32-2^24+2^16-2^8+1, 2^8+1)#?