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定积分理解成F(a)-F(b),求导就是F′(a)a′-F′(b)b′
=lim-e^(-cos²x)(cosx)′/2x=lime^(-cos²x)/2=1/2e
=1/√(1+(x³)^4)*(x³)′-1/√(1+(x²)^4)*(x²)′
=-1/2∫(1-x²)^(-1/2)d(1-x²)=-√(1-x²)
=∫(x+1/2+3/2)/√(2x+1)dx
=1/4∫√(2x+1)d(2x+1)+3/4∫1/√(2x+1)d(2x+1)
=(1/6)(2x+1)^(3/2)+(3/2)√(2x+1)
=lim-e^(-cos²x)(cosx)′/2x=lime^(-cos²x)/2=1/2e
=1/√(1+(x³)^4)*(x³)′-1/√(1+(x²)^4)*(x²)′
=-1/2∫(1-x²)^(-1/2)d(1-x²)=-√(1-x²)
=∫(x+1/2+3/2)/√(2x+1)dx
=1/4∫√(2x+1)d(2x+1)+3/4∫1/√(2x+1)d(2x+1)
=(1/6)(2x+1)^(3/2)+(3/2)√(2x+1)
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