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Is the partial derivative of binary function f'x f'y all or only one? What is the difference between partial derivative and differentiable? Such as the title
In general, it means that two partial derivatives must exist. Differentiable must be differentiable, but not differentiable
Binary function z = f (x, y), now the first partial derivative of Z about X is equal to zero, what does that mean?
Z = f (x, y). In fact, Z is a function of one variable with respect to y
Let 1 know y = in (arccos2x), find Dy, 2 find y = x ^ 2, x = y ^ 2, 3 find LIM (x to a) e ^ (-)
Let 1 know y = in (arccos2x), find Dy, 2 find the area of the figure surrounded by y = x ^ 2, x = y ^ 2, 3 find the limit LIM (below is x to a) e ^ (- x) - e ^ (- a) / x-a
1. Given y = in (arccos2x), find dy
dy=(arccos2x)′dx/(arccos2x)=-2dx/[(arccos2x)√(1-4x²)]
2 find the area of the figure surrounded by y = x & # 178;, x = y & # 178,
First, find the abscissa of the intersection of two curves: substitute the former formula into the latter formula to get x = x & # 8308;, X (X & # 179; - 1) = x (x-1) (X & # 178; + X + 1) = 0, so x & # 8321; = 0; X & # 8322; = 1, then the area of the figure surrounded by two curves
S=[0,1]∫[(√x)-x²)]dx=[(2/3)x^(3/2)-x³/3]︱[0,1]=2/3-1/3=1/3
3 find the limit x → Alim [e ^ (- x) - e ^ (- a)] / (x-a)
The original formula = x → Alim [- e ^ (- x)] = - e ^ (- a) = - 1 / e ^ a
The number of girls in class 61 is three fifths of that of boys, and the number of girls is several percent of that of the whole class
Explain the reason and explain it in detail
Girls 3, Boys 5, class 5 + 3 = 8. Understand?
3÷8 = 0.375 = 37.5%
Using simple method to calculate: 1111 ^ 2 - 111 ^ 2
1111²-111²=（1111+111）×（1111-111）=1222×1000=1222000
Square difference formula
If the sequence {BN} satisfies: BN = a3n-2 + a3n-1 + a3n, then the sum of {BN} is on line
Such as the title
Multiple choice questions a, S B 3S C S ^ 2 D S ^ 3
There are no other conditions? For example, the common ratio of an
How to calculate 63 times 13 / 62
Hello!
63x13/62
=(62+1)x13/62
=62x13/62+1x13/62
=13+13/62
=13 and 13 / 62
I'm glad to answer for you, hope to help you. If you don't understand, please ask. If you are satisfied, please accept. Thank you!
2 2 4 8 14 26 48 88
162.
law:
0+2+2=4
2+2+4=8
2 +4 +8=14
4+8+14=26
8+14+26=48
14+26+88=162
A three digit number is the smallest prime number on the hundreds, the smallest even number on the tens, and the smallest composite number on the ones______ ．
A three digit number is the smallest prime number in the hundreds, the smallest even number in the tens, and the smallest composite number in the ones. The three digit number is 204
Given the function f (x) = 1 + 2 / x, find the value of F (1) * f (2) * f (3)... * f (100)
Superposition multiplication, f (1) = 3 / 1, f (2) = 4 / 2, f (3) = 5 / 3, f (4) = 6 / 4 f(99)=101/99,f(100)=102/100,
So the product is
(3*4*5*6*…… *99*100*101*102)/（1*2*3*4*…… *97*98*99*100）=(101*102)/(1*2)=5151.
RELATED INFORMATIONS
- 1. Dy / DX = 2Y (3-y) Lim "x →∞" why is y = 3 y(4)=1 Why can we conclude that the limit is 3 instead of 0 when we don't understand the differential equation?
- 2. For dy / DX... No formula Finding dy / DX y-e^(-xy)=x-e^(xy) Challenge yourself!
- 3. In Chapter 3, for any piecewise function, if the left and right derivatives exist at the piecewise point, can we say that the function is continuous at the tapping point? Both left and right numbers exist, but they are not necessarily equal
- 4. Let z = Z (x, y) be the implicit function determined by the equation x ^ 2 + Z ^ 2 = ysin (Z / x), and find the partial derivative of Z to x, y I am a math idiot
- 5. Given DZ = 5xdx + Y & # 710; 2dy, find δ & # 710; 2Z / δ y δ x, (second order mixed partial derivative), and δ is the sign of partial derivative
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- 8. Finding the total differential of the function u = x2 + sin (Y / 3) + e ^ XY
- 9. When using discriminant method to find the range of function, how to judge whether the quadratic coefficient of discriminant is equal to 0?
- 10. The method of finding the range of fractional function For the form y = ax ^ 2 + BX + C / ex ^ 2 + FX + G and the function domain is not r (such as x > 0), the general method is to find the range ----------- Note that the general solution, that is to say, the fractional function can not be directly converted to the mean inequality, nor can it be directly separated from the constant form Here, the domain of definition of X is not r, so the discriminant method should not be used Big brother, the discriminant method to define the domain must be r The question is how to ask Answer 3L: the definition field is not R. for example, how to find the value field of x = 2 to the power of T?
- 11. This paper proves whether there is a function, which satisfies the following condition: "differentiable everywhere, but the derivative function is discontinuous everywhere" Because we already know that there is a kind of function which is "continuous everywhere but not differentiable everywhere", but we can't find any proof on the Internet about the existence of this kind of function
- 12. Prove that the limit of binary function does not exist?
- 13. If f (x) defined on R satisfies f (x + y) = f (x) + F (y) + 2XY (x, y ∈ R), f (1) = 2, then f (- 3) is equal to () A. 2B. 3C. 6D. 9
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- 15. Then the total differential of DZ, Z | x = 1, y = 1 is
- 16. X power of Z = y + 1 power of 8, y power of 9 = X-8 power of 3, find xy =?
- 17. Find the general solution of (1 + x2) dy + (1 + Y2) DX = 0
- 18. General solution of differential equation (x2 + Y2) DX = xydy X2 is the square of X
- 19. ∫ y ^ 2 * e ^ - YDY = how to calculate
- 20. Given the square of X + xy = 2 and the square of Y + xy = 5, what is the value of the square of 2x + 5xy + 3Y?