Piecewise function f (x) = 1 (1) You should have done something wrong

Piecewise function f (x) = 1 (1) You should have done something wrong

F (x) is a piecewise function, substituting g (x) g (x) = 1-ax, x = [1,2] = (1-A) X-1, x = (2,3] when a = 1, G (x) = 1-x, x = [1,2] = - 1, x = (2,3] H (a) = 0 - (- 1) = 1, x = [1,2] = 0, x = (2,3] when a is greater than 1, G (x) = 1-ax, x = [1,2] = (1-A) X-1, x = (2,3] H (a) = a, X =

If f (x) = ax & # 178; BX C satisfies f (0) = 3, the axis of symmetry is a straight line x = - 1, and the minimum value is 2, then the expression of the function is?
If f (x) = ax & # 178; + BX + C satisfies f (0) = 3, the axis of symmetry is a straight line, x = - 1, and the minimum value is 2, then the expression of the function is? To solve the problem in detail, thank you

c=3
-b/2/a=-1
a-b+c=2

The symmetric axis of the quadratic function y = AX2 + BX + C is x = 3, the minimum value is - 2, and it passes (0, 1)

∵ the symmetry axis of quadratic function y = AX2 + BX + C is x = 3, the minimum value is - 2, ∵ the vertex coordinates of the quadratic function are: (3, - 2), ∵ the quadratic function is: y = a (x-3) 2-2, ∵ Guo (0, 1), ∵ 9a-2 = 1, the solution is: a = 13, ∵ the analytic formula of the quadratic function is: y = 13 (x-3) 2-2 = 13x2-2x + 1

Given the function f (x) = LNX + (3-x) / x, if the tangent of the curve y = f (x) at (1, f (1)) is parallel to the straight line y = 1-2x, the value of a is obtained

Is it the function f (x) = alnx + (3-x) / x
f'=a/x-1/x^2
f'(1)=a-1=-2
a=-1

What is the density of coal? How many tons is 1.9 cubic meters of coal?

The density of different kinds of coal is different, which is generally calculated by bulk density

(- 2x-1) square (2x-1) square - 16 (x + 3) square (x-3) square, calculated by square difference or complete square formula,
Busy, I haven't been on the first day of junior high school

Square of the square (2x-1) of (- 2x-1) = [(- 2x-1) (2x-1)] & # 178; - 16 [(x + 3) (x-3)] & # 178; [inverse with "product power" formula] = [(- 1-2x) (- 1 + 2x)] & # 178; - 16 [(x + 3) (x-3)] & # 178; = [(- 1) & # 178; - (2x) & # 178;] & # 178

Calculation: 1 + 2 / 3 + 3 / 3 square + 4 / 3 cube + 5 / 3 4th power +. + 101 / 3 100th power

The sum is S100, S100 = 1 + 2 / 3 + 3 / 3 ^ 2 +. 101 / 3 ^ 100, S100 / 3 = 1 / 3 + 2 / 3 ^ 2 + 3 / 3 ^ 3 +. 100 / 3 ^ 100 + 101 / 3 ^ 101, s100-s100 / 3 = 2s100 / 3 = 1 + 1 / 3 + 1 / 3 ^ 2 +. 1 / 3 ^ 100-101 / 3 ^ 101 = (3 - (1 / 3) ^ 100) / 2-101 / 3 ^ 101, S100 = 9 - (1 / 3) ^ 99 / 4-101 / 2x3 ^ 100

Density versus mass and volume

No, because the mass of the same physical unit volume is a certain value, that is, the density of the same material is equal. The density of an object has nothing to do with the mass and volume of an object, but density is only a physical property of an object

Second semester mathematics real number calculation ~ urgent ah! Online and so on!
Root 2-2
³ 61-1 / 125 under the radical
It is cubic and absolute

Root 2-2 = 2-root 2
³ 61 / 125-1 under the radical = (#) 179; 64 / 125 under the radical = 4 / 5

If M is the moving point on the parabola y ^ = 4x, f is the focus of the parabola, and P (3,1) is the fixed point, then the minimum value of / MP / + / MF /?

The parabola directrix is x = - 1. Let the intersection of the straight line passing through M and the directrix be n
According to the definition of parabola, / Mn / + / MP / = / MF / + / MP / so when m.p.n three points are collinear, the distance is the shortest! / Mn / + / MP / = 3 + 1 = 4 is the minimum value of / MP / + / MF /!