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Find lower sum please help

  1. Nov 25, 2007 #1
    Find lower sum....please help!!

    1. The problem statement, all variables and given/known data
    Find the lower sum for f(x) = x^2 +1 between 0 and 2 using a change in X = 1/2


    2. Relevant equations



    3. The attempt at a solution
    [(0^2 + 1) * 1/2] + [(1/2^2 + 1) * 1/2] + [(1^2 + 1) * 1/2] + [(3/2^2 + 1) * 1/2] = 3.75

    Is this right?
     
  2. jcsd
  3. Nov 25, 2007 #2
    Seems ok to me.
     
  4. Nov 25, 2007 #3

    HallsofIvy

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    Staff Emeritus
    Science Advisor

    It would be better to use parentheses for things like (3/2)^2= 9/4 (not 3/2^2= 3/4) but, in fact, you've done that exactly right.
     
  5. Nov 25, 2007 #4
    Thank you! Is there a way to check this on my calculator?
     
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