Questions asked by Tom

• Back to user's profile
• How you determine the parametric equation of a line with the cartesian equation `ax+by+cz + d = 0 ; a'x+b'y+c'z + e = 0` and vice versa ?
  
• How do i determine the distance between `x^2+y^2-z^2=1` and the point `P(1,3,1)` ?
  
• Given the following system `x^2+y^2-z^2+w^2=2 ; x+2y+z^2-3w^2=1` how do I show that if the couple of solution `(x_0,y_0,z_0,w_0)` satisfy `z_0*w_0 != 0` I can find solution for `z` and `w` depending to `x` and `y` ?
  
• I do find a polynomial such as `P(-3) = 0` `P(4) = 0` and `P'(-sqrt(3)) = 0` `P'(e) = 0` ?
  
• How do i find a function such as `f(a)f(b)f(c) = f(sqrt(a^2+b^2+c^2))f^2(0)` ?
  
• How can i find a plane `P` with `A(0,-1,1) in P`, `B(-1,2,3) in P` and parallel to the y axis ?
  
• How i calculate the value of the sum `2^(n+3)/(n!)` ?
  
• How do you demonstrate that, if `(df)/(dr)= (dg)/(dy)`, then `(df)/(dr)= (dg)/(dy) = K` where K is a constant ?
  
• Why when i add `NaOH` to 1 it give 2 and not 3 ?
  
• I put sugar on strawberry after few time they becom softened and juicy why ?
  
• `(dL)/L = \alphadT + 1/(sE_T)df \rightarrow ln(L/L_0) = \alpha\DeltaT + f/(sE_T)` Is that mathematically correct ?
  
• Solving this electronic problem with impedance ?