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The minimum number of equal length subintervals needed to approximate $\int_1^2 xe^x\,dx$ to an accuracy of at least $\frac{1}{3}\times10^{-6}$ using the trapezoidal rule is

  1. 1000e
  2. 1000
  3. 100e
  4. 100
in Numerical Methods by Veteran (52.2k points)
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1 Answer

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I am not sure of the solution,posting it from source http://www.cse.iitd.ac.in/~mittal/gate/gate_math_2008.html 

question 21

It will be highly appreciable if anyone can explain it.

by Loyal (9.6k points)

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