Let f(x) be defined by f(x) = x if x 0. the value of the integral from -2 to 1 of xf(x)dx =
a.3/2
b.5/2
c.3
d. 7/2
e. 11/2

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|dw:1355956366325:dw|
\[\int\limits_{-2}^{1} xf(x)dx\]

basically the pieces
\[x, x \le 0\]
\[x+1, x > 0\]

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