Friday, April 11, 2008

Can you tell me why

  1. To find the area under a curve bounded by 2 x-values, I integrated the curve and substituted the x-values. The area came out -ve.
  2. To find the area under a curve bounded by 2 x-values, I integrated the curve and substituted the x-values. The area came out zero, 0.
  3. Why is the integral of e^-x = -e^-x and not e^-x?
  4. Why is the integral of e^9x = 9e^9x and not e^9x?
  5. How can this be solved for x 3 x^2 - 12 = 0?
  6. How can this be solved for x 3/2 x^2 - 12/x = 0?

1 comment:

rodriguez said...

Area cannot be negative so just ignore the negative sign.if the area came out to be zero, then the two x values are the same.the integral of e^-x = -e^-x and not e^-x because the defferential of -x = -1; which is placed infront of the equation.same thing applies it the x power has a coeeficient infront of it.