If (x-a, cos x-b sinx)'dx min (x -acos x-bin x) dx} to calculate a, cos x +b, sin x
2021-09-27 15:27
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回答Let f(x,) be continuous, to calculate dy(x,y)dx
2021-09-27 15:27
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回答2 Let the probability density of population xbe e x>0 where is an unknown0 other parameter and greater than 0. X1, X2... 查看全部
2021-09-27 15:25
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回答1x2 Let the probability density of the random variable X be f=
2021-09-27 15:25
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回答quadratic(x1,x2,x3)=2(a1x1+a2x2+a3x12,333)2+(b1x1+b2x2+b3x3)2b a=a2=b2 Remember3 b3 (1) prove that the matrix correspond... 查看全部
2021-09-27 15:24
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回答(1a Set A=10,B- When a and are whatever, there is a matrix C such that b AC-CA-b, and find all the matrices C.
2021-09-27 15:23
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回答Let the line L pass through two points A(1,0,0) and(,1,), and rotate L around axis Z to obtain surface The solid bounded... 查看全部
2021-09-27 15:22
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回答Let the odd function f(x) have the second derivative on [-1,1], and f(1) =1, prove: (1)There exists(0,1) such that f'()=... 查看全部
2021-09-27 15:21
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回答3 Find the extreme value of the function(x,y)=y+lex+y
2021-09-27 15:19
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回答Let the sequence {an} satisfy condition:=3, =1, an-2-n(n-1) =0(n=2) S(x) is the sum of the power series∑=0 ()Prove S"()-... 查看全部
2021-09-27 15:17
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