Y multiplied by the root number under 2y y squared How to integrate?

double integral, where x is treated as a constant when finding the integral for y; When finding the integral of x, treat y as a constant, and the integral is sufficient.

For y integrals, it is sufficient to treat "1-x" as a "constant".

ydy=½d（1-x²-y²）

Since x and y are independent of each other, x is equivalent to a constant in this equation.

(root number x y) dxdy

1 4x dx (root number x y)dy

0 x1 |4x

2/3)(x+y)^(3/2)| dx0 |x∫ (2/3)(x+4x)^(3/2)-(2/3)(x+x)^(3/2)dx

2 3) (5 (3 2)-2 (3 2)) x (3 2)dx(2) (5 5-2 2) (2 5) x (5 2)|(4 15) (5 root number 5-2 root number 2) (1-0) (20 root number 5-8 root Sidzu number and 5) 15

Line Wrap Old Yuan Lingqiao(x +y) 1 2)dx= y[(x y) +1] (1 gear Wang Sheng2)dxlet,x y=tant

How to integrate under the root number (x 2-y 2).

X points for Ki Kiyomori or positive points for y points? x integrals for the acre: (x 2-y 2) (1 2)dx=(x 2)(x 2-y 2) (1 2)+[y 2) 2]ln(x+(x 2-y 2) (1 2)) absolute value + c to y integral:

x^2-y^2)^(1/2)dy=(x/2)(x^2-y^2)^(1/2)+(x/2)arcsin(x/y)+c

i.e. (x -6x+9) + (y +2y+1) = 0x-3) + y + 1) = 0

The square is greater than or equal to 0, the addition is equal to 0, if one is greater than 0, then the other tomb is buried less than 0, which is not true.

So both are equal to 0

So x-3=0, y+1=0

x=3,y=-1

Original = (1+y) x-y

1-1)√x-(-1)

1,7,x square + y square - 6x + 2y + 10 = 0x - 6x + 9 + y + 2y + 1 = 0

x-3)²+y+1)²=0

then x-3=0 and y+1=0

then x=3, y=-1

The root number of the pants is x) + y times (the root number x) -y

1,1,

Summary. Cause.

Integral of y l-y under the root number.

Cause. Yes, it's an absolute value, and it stands for the + sign.

Isn't there an absolute value of tant, and the cost behind it, shouldn't the whole have a plus or minus sign? Why is there no number?

The tant has an absolute value.

Since you can't be sure whether the sint or cost is positive or negative, you need to add an absolute value symbol.

Number. It's an absolute symbol.

Add the absolute value.,Ant is positive.,How about the cost behind it?