Calculus

Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places.
int_2^10 2 sqrt(x^2+5)dx text(, ) n=4

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asked by Justin
  1. Explain what you mean by "n" and "text(, )"
    Probably no one has responded to your questions because your notation is unfamiliar.

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    posted by drwls
  2. In general midpoint rule is
    integral from
    Xo to Xn is approximated by rectangles of base delta x = Xk - Xk-1 and height f([Xk+Xk-1]/2)
    so
    integral is approximately
    sum from k = 1 to k = n of f([Xk+Xk-1]/2) delta x

    NOW HERE - You have not told us over what interval
    nor do I really understand what f(x) is
    like what does 2^10 2 mean?
    2^10 is 2 to the tenth. Is this times another two so it is 2^11. Please be careful with parentheses.

    Anyway here is how to do the problem.
    Divide whatever your interval is by four if n is four then delta x = interval/4
    label those five x points Xo X1 X2 X3 X4

    calculate f(x) at (X1-Xo)/2 and (X2-X1)/2 and (X3-X2)/2 and (X4-X3)/2
    then add them up and multiply by delta x

    done

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    posted by Damon

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