有人知道这道题怎么算的吗?求具体过程
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不定积分∫y(y²/2+2y+2-(y^4)/2)dy
=∫[(y^3)/2+2y²+2y-(y^5)/2]dy
=1/2×(y^4)/4+2/3×y^3+y²-1/2×(y^6)/6+C
=(y^4)/8+2/3×y^3+y²-(y^6)/12+C
分别将y1=-1,y2=2代入求值,
定积分=2^4/8+2/3×2^3+2²-2^6/12-
(-1)^4/8-2/3×(-1)^3-(-1)²+(-1)^6/12
=16/8+2/3×8+4-64/12-1/8+2/3-1+1/12
=5.625
=∫[(y^3)/2+2y²+2y-(y^5)/2]dy
=1/2×(y^4)/4+2/3×y^3+y²-1/2×(y^6)/6+C
=(y^4)/8+2/3×y^3+y²-(y^6)/12+C
分别将y1=-1,y2=2代入求值,
定积分=2^4/8+2/3×2^3+2²-2^6/12-
(-1)^4/8-2/3×(-1)^3-(-1)²+(-1)^6/12
=16/8+2/3×8+4-64/12-1/8+2/3-1+1/12
=5.625
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