The graph of the linear function y = - 3x + 2 does not pass () A. First quadrant B. second quadrant C. third quadrant D. fourth quadrant

The graph of the linear function y = - 3x + 2 does not pass () A. First quadrant B. second quadrant C. third quadrant D. fourth quadrant

∵ k = - 3 ＜ 0, B = 2 ＞ 0, the image passes through one, two, four quadrants, not through the third quadrant
Let the elements in the set G be all numbers of the form a + B radical 2 (a ∈ Z, B ∈ z), and prove that if x ∈ g, x + y ∈ g, and 1 / X is not necessarily an element of the set G
Let: A, B, C, D ∈ Z
X = a + B radical 2
Y = C + D radical 2
X + y = (a + C) + (B + D) radical 2, a + C, B + D ∈ Z
So: x + y ∈ G
Let: x = 0 + radical 2
1 / x = 1 / radical 2 = radical 2 / 2
1 / 2 does not belong to Z
1 / X does not belong to g
As shown in the figure, if point a (- 3,4) is on the image of the linear function y = - 3x-5, the intersection of the image and the Y axis is B, then the area of △ AOB is______ .
∵ the ordinate of the intersection of the graph of a linear function and the y-axis is the number on the constant term of a linear function. The coordinates of point B are: (0, - 5), ∵ ob = 5, while a (- 3,4), ∵ s △ AOB = 12 × ob × 3 = 0.5 × 5 × 3 = 7.5
Let the elements in the set G be all numbers of the form a + B radical 2 (a ∈ Z, B ∈ z), and prove that if x ∈ g, y ∈ g, then x + y ∈ g, and 1 divided by X is not necessarily a number
Let: A, B, C, D ∈ Z
X = a + B radical 2
Y = C + D radical 2
X + y = (a + C) + (B + D) radical 2, a + C, B + D ∈ Z
So: x + y ∈ G
Let: x = 0 + radical 2
1 / x = 1 / radical 2 = radical 2 / 2
1 / 2 does not belong to Z
1 / X does not belong to g
As shown in the figure, if point a (- 3,4) is on the image of the linear function y = - 3x-5, the intersection of the image and the Y axis is B, then the area of △ AOB is______ .
∵ the ordinate of the intersection of the graph of a linear function and the y-axis is the number on the constant term of a linear function. The coordinates of point B are: (0, - 5), ∵ ob = 5, while a (- 3,4), ∵ s △ AOB = 12 × ob × 3 = 0.5 × 5 × 3 = 7.5
Let the elements in the set G be all numbers of the form a + B (a ∈ Z, B ∈ z), and prove that when x ∈ n, X ∈ G
Because x ∈ n, there must be x 1, x 2 ∈ n such that x = x 1 + x 2, then x ∈ G
As shown in the figure, if point a (- 3,4) is on the image of the linear function y = - 3x-5, the intersection of the image and the Y axis is B, then the area of △ AOB is______ .
∵ the ordinate of the intersection of the graph of a linear function and the y-axis is the number on the constant term of a linear function. The coordinates of point B are: (0, - 5), ∵ ob = 5, while a (- 3,4), ∵ s △ AOB = 12 × ob × 3 = 0.5 × 5 × 3 = 7.5
Given the set a = {x.xy. Radical XY-1}, B = {0, IXI, y}, a = B, find the value of real number x, y
No derivative
Let 0 = x, then xy = 0, a has two identical elements
Let 0 = XY, and because x is not equal to 0, y = 0, there are two identical elements in B
Let 0 = root XY-1, we get root xy = 1, we get xy = 1, let xy = y, we get x = 1, there are two identical elements in a
Then xy = IXI, x = 1 or - 1, because x = 1, there are two identical elements in a, so x = - 1, y = - 1
There's nothing I can do````
If we know the first-order function y = - 2x + B, the area of the triangle bounded by its image and two coordinate axes is 4, we can find the value of B
Given the linear function y = - 2x + B, the intersection points of its image and two coordinate axes are (0, b) and (B / 2,0)
The area of the triangle formed by the image and the two coordinate axes is 4
|b|*|b/2|/2=4
So B = 4 or B = - 4
The value of B is ± 4
Which of the four values do you want
How to solve the equation 1 / √ XY + y + 1 / √ XY + X
1/(√xy+y) +1/(√xy+x)
=1/√y(√x+√y) +1/√x(√x+√y)
=(√x+√y) / √x√y(√x+√y)
=1/√xy