help me please

uzma khan <[email protected]>
Newsgroups gmane.education.schools.virtual-university,gmane.org.students.paistan
Message-ID <[email protected]>
Asslaam-O-Alaikum
  please give me some hints for these questions
  Question # 1
   
  a- What are the critical points of f?
  b- On what intervals is f increasing and decreasing?
  c- At what points, if any, does f assume local maximum and minimum values?
     
  
  f '(x) = (x-1)2 (x+2) 
  Question # 2 
   
  Let 
   
  f(x) =      5x            x 1         
               ax + b ,       x>1 
  Find the values of a and b so that f is differentiable at x=1
   
  i shall be very thankfull to you for this favour
  Uzma

		
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