If the image of a function of degree passes through points (1,1) and points (- 1, - 5), the area and perimeter of the triangle formed by the image of the function and the two coordinate axes are known

If the image of a function of degree passes through points (1,1) and points (- 1, - 5), the area and perimeter of the triangle formed by the image of the function and the two coordinate axes are known

Slope k = (- 5-1) / (- 1-1) = 3
So the line is y = 3 (x-1) + 1 = 3x-2
When x = 0, y = - 2
When y = 0, x = 2 / 3
The right angle sides are 2,2 / 3 respectively,
Hypotenuse = √ (2 ^ 2 + 4 / 9) = 2 / 3 * √ 10
Triangle area = 1 / 2 * 2 * 2 / 3 = 2 / 3
Perimeter = 2 + 2 / 3 + 2 / 3 * √ 10 = 8 / 3 + 2 √ 10 / 3

The function y = X-1 must not pass through the second order___ The area enclosed by the function image and the coordinate axis is___ ．

∵ y = X-1, where the coefficient 1 ＞ 0, the image of the function intersects with the Y axis and the negative half axis; ∵ the image of the primary function passes through the first, third and fourth quadrants, that is, the image of the function does not pass through the second quadrant; ∵ when x = 0, y = - 1; when y = 0, the intersection points of the image of x = 1 ∵ y = X-1 and the two coordinate axes are (0, - 1) and (1, 0)

The area of a triangle formed by a function image and two coordinate axes
How to find the area of the triangle formed by the image of the function y = 3x + 2 and the two coordinate axes?

Let x = 0, then y = 2
Let y = 0, then x = - 2 / 3
So the area of the triangle formed by the image of the function y = 3x + 2 and the two coordinate axes is 2 * 2 / 3 * 1 / 2 = 2 / 3

If the image of a function y = MX + 2m passes through the second, third and fourth quadrants, and the square of M-1 = 3, the area of the triangle enclosed by the function image and the coordinate axis can be obtained

∵m^2-1=3
∴m^2=4
m=±2
∵ a function passes through two, three and four quadrants
∴m=-2
∴y=-2x-4
The intersection of Y and X axis is (- 2,0)
The intersection point with y axis is (0, - 4)
∴S=1/2*4*2=4

What is the difference between wdz-yjv and wdzbn-yjv,

WD halogen free low smoke
Z stands for flame retardant
ZB flame retardant grade B
N refractory
YJV is a cross-linked cable
1kV is the applicable voltage level
3 * 25 + 2 * 16 are 3 sections 25 and 2 sections 16
CT Bridge
We laid along the wall

What is the meaning of zr-yjv-1-2 * 3 * (1 * 185) + 1 * 185 + bv185?

What is the meaning of zr-yjv-1-2 * 3 * (1 * 185) + 1 * 185 + bv185? Zr-yjv flame retardant XLPE insulated PVC sheathed power cable, 1kV, 2 parallel, 3 pieces of 1 * 185mm2 (three-phase, one for each phase), that is, each phase has 2 pieces of 185mm2 cores, three-phase has 6 single core cables

YJV-1KV-(4*70)SC100 NS250N-200A/4P 300mA

YJV cable model
1kV - voltage class 1000V
4 * 70-4 cables with a cross section of 70 square mm
SC100 - laying through diameter 100 steel pipe
Ns250n-200a / 4P - switch model, the rear 4P is 4-pole switch
300mA is the rated residual action current. Generally, the setting of the upper level should be larger, and 30mA current should be selected at the end

What do you mean by yjv-1kv 3 * 4?

YJV is the type of cable, 0.6-1kv is the rated voltage of cable, 3 * 4 is three 4 square 3-core cables

What does specification zr-yjv-10 * 1.5 mean
What does the specification zr-yjv-1.5 * 10 mean

Zr: flame retardant
YJ: cross linked polyethylene insulation
5: PVC sheath
10 * 1.5-1.5mm2 10 core wire
Combine the above sentences to know what the cable is
Flame retardant - XLPE insulation - PVC sheath - 1.5mm2 10 core wire

What does zr-yjv-4 * 35 + 1 * 16 mean

Zr-yjv flame retardant cross linked cable
4 * 35 4 35mm2 copper cores
1 * 16 1 piece of 16mm2 copper core (for grounding)