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BIẾT $ \INT\LIMITS_0^1 {F\LEFT( X \RIGHT)DX} = – 2$ VÀ $ \INT\LIMITS_0^1 {G\LEFT( X \RIGHT)DX} = 3,$ KHI ĐÓ $ \INT\LIMITS_0^1 {\LEFT[ {F\LEFT( X \RIGHT) – G\LEFT( X \RIGHT)} \RIGHT]DX}$ BẰNG