Recent content by Mathnewbie

  1. M

    What is the derivative of a function represented by lim sin x / x at x=0?

    well the definition of the derivative is f(a+h) -f(a) f'(a) = lim ------------- h->0 h not sure how this helps me. Just having problems with this stuff. look through my notes and textbook and cannot find any problems like this. Not sure how to...
  2. M

    Answer Limit Question: -3 | Good Day

    just looking the my proofs solution I don't understand how 3^(x+1) * 2 = 2e^(x+1). Can anybody explain this?
  3. M

    Answer Limit Question: -3 | Good Day

    Good Day I have this limit question that I need to evaluate. I know the answer but am unsure how to answer it. Evalualte: lim (3^(x+1))(2-3^(-x)) x-> -Infinity I know the answer is -3. Any help would be great
  4. M

    What is the derivative of a function represented by lim sin x / x at x=0?

    Good Evening I am studying for my exam next week and am not sure how to answer this question from one of my term test. lim sin x / x represents the derivative of what function at what x->0 number? Does anybody know to do this? thanks
  5. M

    Solving Derivatives Problems: Understanding dv/dt and dv/ds Differences

    Hello can someone point in the right direction on this one. A particle moves along a strainght line with displacement s(t), velovity v(t), and acceleration a(t). Show that a(t) = v(t) dv/ds Explain the difference between the meanings of the derivatives dv/dt and dv/ds. Does dv/dt...
  6. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    I think I need to be a little more organized when I am solving a question so I know what I have done already. Thanks for the help.
  7. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    all we have done with min or max is in the for of ax^2 + bx + c if a < 0 then x= -(b)/2a is the max if a > 0 then x= -(b)/2a is the min this was a assignment and I got it wrong and think there will be something like it on the test. This is the only min max question we have had...
  8. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    in this A=(\frac{x}{4})^{2}+\frac{\sqrt{3}}{4}(\frac{10-x}{3})^{2} what happen 1/2 from the area of triangle?? Just wondering.
  9. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    cool thank i will try to figure out where made the mistakes. how do i figure out this part For what value is of x is this total area a minimum Thanks again
  10. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    Yeah I should have seen that. So now that I know that the height h=\frac{\sqrt{3}}{2}s I can plug s into the height formula and the height formula into the area like this A=\frac{1}{2}(\frac{10-x}{6})(\frac{\sqrt{3}}{2})(\frac{10-x}{3})...
  11. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    how did you get h=\frac{\sqrt{3}}{2}s from s^{2}=(\frac{s}{2})^{2}+h^{2} ??
  12. M

    Solving Word Problem: 10m Wire Cut into Square & Triangle

    Hello I have this word problem that I am having problems solving. Hopefully someone can help Here is it. A piece of wire 10m long is cut into two pieces. On piece, of length x, is bent into the shape of a square. The other is bent into the shape of a equilateral triangle. (a) expess...
Back
Top