已知函数f(x)f(x)f(x)在区间[−2,1][-2,1][−2,1]上连续,且∫−20f(x)dx=−1\int_{-2}^{0}f(x)dx=-1∫−20f(x)dx=−1,∫01f(x)dx=2\int_{0}^{1}f(x)dx = 2∫01f(x)dx=2,则∫−21f(x)dx=\int_{-2}^{1}f(x)dx=∫−21f(x)dx=( ).
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