大一数学微积分,(3-2x-x^2)^1⼀2的不定积分,要过程,谢谢

大一数学微积分,(3-2x-x^2)^1/2的不定积分,要过程,谢谢如图
2025-01-09 02:25:15
推荐回答(3个)
回答1:

解:

令x+1=2sint,则x=2sint-1,t=arcsin[(x+2)/2]

∫√(3-2x-x²)dx

=∫√[4-(x+1)²]dx

=∫√[4-(2sint)²]d(2sint-1)

=∫2cost·2costdt

=2∫(1+cos2t)dt

=2t+sin(2t) +C

=2t+2sintcost +C

=2arcsin[(x+2)/2]+2[(x+1)/2]·½√(3-2x-x²) +C

=2arcsin[(x+2)/2]+½(x+1)√(3-2x-x²) +C

回答2:

见图

回答3:


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