In order to make (x-1) 0 - (x + 1) - 2 meaningful, what conditions should the value of X satisfy?

In order to make (x-1) 0 - (x + 1) - 2 meaningful, what conditions should the value of X satisfy?

From the meaning of the question: X-1 ≠ 0, x + 1 ≠ 0, the solution: X ≠ 1 or - 1

If the image of power function f (x) passes through points (4,12), then the value of F-1 (8) is ()
A. 116B. 164C. 18D. 14

Let the power function be: y = x α∵ the image of the power function passes through the point (4,12), ∵ 12 = 4 α ∵ α = - 12 ∵ y = x − 12 ∵ f (x) = 8 {x − 12 = 8} x = 164, so B is selected

If the power function f (x) is known to pass through point (2,8), then f (3) = ()
A. 27B. 9C. 12D. 4

Let f (x) = x α and the power function f (x) pass through the point (2,8) and 〈 f (2) = 2 α = 8. The solution is α = 3, that is, f (x) = X3 〉 f (3) = 33 = 27, so a

What is f (x) if f (x-1) = xsquare-2x? What is the discontinuity of y = (xsquare-2x-3) / x + 1

If f (x-1) = (x-1) & sup2; - 1, then f (x) = x & sup2; - 1
The second function can be equivalent to y = (x + 1) (x-3) / x + 1; let y = 0. We can get x = 0; - 1; 3
So the discontinuities are (0,1); (- 1., 1); (3; 1)

It's from pep
(only the title,
The score only needs to be added and subtracted

25 +15 ＝
47 -27 ＝
58 +18 ＝
19 +29 ＝
16 +16 ＝
23 -13 ＝
910 +110 ＝
712 -512 ＝
255 -105 ＝
10-2.5 ＝
13 +23 ＝
47 -27 ＝
16 +56 ＝
910 -310 ＝
29 +49 ＝
18 +18 +38 ＝
1- 29 -49 ＝
1211 -111 ＝
47 +47 ＝
1-89 ＝
12 +15 +12 ＝
76÷19＝
1-0.001＝
156÷26＝
3.6×0.2＝
360÷45＝
80÷16＝
1.3-0.7＝
0.49+0.16＝
2.6×0.4＝
55÷0.001＝
55×0.001＝
2400÷30＝
25 -15 ＝
34 +14 ＝
29 +59 ＝
12 +12 ＝
58 -38 ＝
56 -16 ＝
13-0.56 ＝
14 -1.5 ＝
910 -410 ＝
0.79+0.79×99＝
1÷5+1÷5＝
0.89×101-0.89＝
1.1-2.7÷27＝
573-（273+169）＝
12.4×11-12.4=
5÷0.25=
0.84÷0.4=
0.25×16=
2.5×40=
700-699.9=
620÷200=
78÷16=
9001-8006=
144÷12=

Cut out the biggest square on a piece of rectangular paper 10 cm long and 6 cm wide. What is the shape of the rest? What's its area? What's the area of a square?

According to the stem analysis, the side length of the largest square is 6cm. The remaining part is a rectangle of 6cm long and 10-6 = 4cm wide. The remaining area is 6 × 4 = 24 (square centimeter), and the square area is 6 × 6 = 36 (square centimeter). A: the remaining figure is a rectangle with an area of 24 square centimeter, and the square area is 36 square centimeter

There is a sinusoidal alternating current whose instantaneous current value is expressed as I = 141.4sin314t A. then its effective current value is
There is a sinusoidal alternating current whose instantaneous current value is expressed as I = 141.4sin314t A. then its effective current value is

I = 141.4 / √2 = 100 A

Make a cuboid oil tank with iron sheet. The bottom area is a square with side length of 50 cm and height of 80 cm. At least use iron sheet to make it flat
How many liters of gas can you hold at most?

Bottom area = 50 * 50 = 2500 square centimeter
Side area = 4 * 50 * 80 = 16000 square centimeters
Top area = bottom area = 2500 square centimeters
Total area = 2500 * 2 + 16000 = 21000 square centimeters
A: at least 21000 square centimeters of iron sheet is needed

The amount of work is equal to___ Multiply by___ Working hours equal to___ Work efficiency___ What? Thank you

Total amount of work = working rate X working time = total amount of work △ working rate

The surface area and volume of the cone are calculated by taking the sector with the center angle of 120 ° and the area of 3 π as the side of the cone

Let the generatrix of the cone be l, the radius of the bottom surface be r, ∵ 3 π = 13 π L2 ∵ L = 3, ∵ 120 ° = R3 × 360 °, ∵ r = 1, ∵ the height of the cone is 9-1 = 22 ∵ the surface area of the cone is π R2 + π RL = 4 π, and the volume of the cone is 13 × π × 12 × 22 = 22 π 3