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∫[-1,1]xdx/(5-4x)
=-1/4 ∫[-1,1](-4x+5-5)dx/(5-4x)
=-1/4 ∫[-1,1]dx +5/4 ∫[-1,1]dx/(5-4x)
=-1/4×(1+1) - 5/16 ∫[-1,1]d(5-4x)/(5-4x)
=-1/2 - 5/16 ln|5-4x| |[-1,1]
=-1/2 - 5/16×(ln1-ln9)
=-1/2 - 5/16 ×(0-2ln3)
=-1/2 +5ln3 /8
=-1/4 ∫[-1,1](-4x+5-5)dx/(5-4x)
=-1/4 ∫[-1,1]dx +5/4 ∫[-1,1]dx/(5-4x)
=-1/4×(1+1) - 5/16 ∫[-1,1]d(5-4x)/(5-4x)
=-1/2 - 5/16 ln|5-4x| |[-1,1]
=-1/2 - 5/16×(ln1-ln9)
=-1/2 - 5/16 ×(0-2ln3)
=-1/2 +5ln3 /8
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