Question: ( b ) If f is integrable on [ a , b ] , then bf ( x ) dxa = lim n nf (

(b) If f is integrable on [a, b], then
bf(x) dxa
=limn
nf(xi)xi =1
, where x =
b an
and xi = a + i x.
Use this to evaluate
2(x24x) dx0
.

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