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Homework Help: Integration by finding limits?

  1. May 6, 2009 #1
    Integration by finding limits???

    Hi Guys, im having a huge problem with integration at the moment and dont know how to approach it cause i have a lousy teacher who couldnt be bothered in actually doing examples on the board. The equation is given as this:

    f(t) = 2^t + t^2

    Using the equation find the area under the curve between 0 and 1 using:

    1) finding certain limits and

    2) Fundamental theorem of calculus.

    I know how to do 2 as integrating the equation yields 2^t/ln2 + t^3/3 and then sub in the numbers for 1 and 0 and subtract.

    Problem is i cant do part 1! Can someone help me with this im desperate. My test is tomorrow!!! Your contribution is much appreciated. Thanks
    Last edited: May 6, 2009
  2. jcsd
  3. May 6, 2009 #2
    Re: Integration by finding limits???

    Riemann sum?
  4. May 6, 2009 #3
    Re: Integration by finding limits???

    [tex]\int_a^b{f(x)}\, \text{d}x = \lim_{n \to \infty}{\sum_{i=1}^n{f(x_i)} \Delta x[/tex]

    Is the definition of an definite integral. If she said to find the limit then it seems like she doesn't want you to estimate with a large n value, but to actually find the limit of the sum.
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