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統計: A(0), B(3), C(0), D(0), E(4) #1560256
統計: A(0), B(3), C(0), D(0), E(4) #1560256
詳解 (共 4 筆)
#4090405
積分:ʃ xa dx = (xa+1)/(a+1)
ʃ x3 - 5 dx = x4/4 - 5x
( 34/4 - 5×3 )-( 14/4 - 5×1 )
= 81/4 - 1/4 - 15 + 5
=20 - 10
=10
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