计算∫x²e^(-lnx)dx等于多少?
计算∫x²e^(-lnx)dx等于多少?
∫x²e^(-lnx)dx
=∫x²*1/xdx
=∫xdx
=1/2x^2+C
计算∫xe^(-lnx)dx等于多少?
∫ x · e^(- lnx) dx
= ∫ x · e^ln(1/x) dx
= ∫ x · 1/x dx
= ∫ dx
= x + C
∫xe^x²dx等于多少
∫xe^x²dx
=1/2∫e^x²dx²=1/2e^x²+C
计算:x²/x-5十25/5-x等于多少呢!
化简后得.X²/X-5 -25/X-5
=X²-25/X-5
=(X+5)(X-5)/X-5
=X+5
满意请采纳!谢谢
计算(x²-y²)(x+y)÷(x+y)²等于
解
(x²-y²)(x+y)÷(x+y)²
=(x+y)(x-y)(x+y)÷(x+y)²
=x-y
1、计算(x²-y²)(x+y)÷(x+y)²等于
原式=(x+y)(x-y)(x-y)÷(x+y)²
=x-y
左边=(a/3)x^(4m-4)y^(3×4-2n)=4x^4y²
所以a/3=4
4m-4=4
12-2n=2
a=12,m=2,n=5
所以原式=12-4+5=13
∫x+1/x²+2x+2dx等于多少.急!
∫[(x+1)/(x²+2x+2)]dx
=∫(x+1)/[1+(x+1)²]dx
=½∫1/[1+(x+1)²]d[1+(x+1)²]
=½ln|1+(x+1)²| +C
=½ln(x²+2x+2) +C
X²加1等于√13X求X²减1等于多少?
(x-√13 /2)²=9/4
x=√13 /2±3/2
x²-1=√13 x-2=9/2±3/2√13
x²+x等于多少?
是不是分解因式?x²+x=x(x+1)
√(x²+1)²等于多少
解
x²+1≥1>0
∴√(x²+1)²
=x²+1