Answers edited by Psykolord1989 .

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• How do you find the sum of `Sigma 10` where k is [1,4]?
  
• How do you find the instantaneous rate of change of `w` with respect to `z` for `w=1/z+z/2`?
  
• How do you use the quotient rule to find the derivative of `y=(1+cos(x))/(1+sin(x))` ?
  
• How do you find the derivative of `y=ln(t)/t^2`?
  
• Question #bc838
  
• Question #d0c3c
  
• How do you find the critical points of a rational function?
  
• Question #84eab
  
• How do you differentiate `f(x)= (1 + sin^2x)/(1 - sin2x)` using the quotient rule?
  
• Question #3b779
  
• If `f(x)= - e^x` and `g(x) =1 / sqrt(1-x`, how do you differentiate `f(g(x))` using the chain rule?
  
• How do you solve `x^2 - 6x + 4 = 0` by completing the square ?