Answers created by PhilippG

• Back to user's profile
• A particle moves along a horizontal line according to the position function `s(t)=t^3-12t^2+36t`, where t is measured in seconds and s is in metres. How do you find the total distance travelled during the first 8 seconds?
  
• If the following is a probability distribution function: `f(x)=k(1/x^2)`, what is k and what is the variance?
  
• Is `f(x)=e^(3-3x)+x/ln2x` concave or convex at `x=1`?
  
• What is the equation of the tangent line of `f(x) =1/ (1+2x^2)` at `x = 3`?