A ^ 7-14a ^ 6 + 49A ^ 5 factorization

A ^ 7-14a ^ 6 + 49A ^ 5 factorization

a^7-14a^6+49a^5
=a^5(a^2-14a+49)
=a^5(a-7)^2

Given that a and B belong to R, and a > b / 2 > 0, find the minimum value of a + 1 / (2a-b) B
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How to convert a centimeter's fourth power into a millimeter's fourth power

1 cm = 10 mm,
Both sides to the fourth power:
The fourth power of 1 cm = the fourth power of 10000 mm

It is known that the functional relationship between the density p (kg / m3) and the volume V (M3) of carbon dioxide is p = V / 9,9 1 when the mass of carbon dioxide remains unchanged
It is known that under the condition of constant mass of carbon dioxide, the functional relationship between density p (kg / m3) and volume V (M3) is p = V / 9,9
1. When V is equal to the square of 5m, it is the density p of carbon dioxide;
2. Please write down the change of carbon dioxide density p with the decrease of V!

Solution;
From the meaning of the title, we can see that P = V / 9,9
1. Substituting v = 5M3 into the function relation P = 5 / 9.9
The solution is p = 0.505 [3 decimal places reserved]
2. Because P = V / 9.9, so V / P = 9.9, when v decreases, P also decreases

3 of 9-2 of 9-8 times the square of 9

9^3-9^2-8*9^2
=9^2(9-1-8)
=0

The standard equation of parabola with quasilinear equation x = 2 is______ ．

Let the parabola y2 = MX, then − M4 = 2, ｜ M = - 8, the standard equation of the parabola is y2 = - 8x, so the answer is y2 = - 8x

Calculation formula of SC cylinder thrust
What is the formula

Effective sectional area of cylinder (cm2) * air source pressure (kg / cm2) = kg,
1MP=9.8kg/cm2,
The effective cross-sectional area of cylinder should consider the area of cylinder shaft

The sum of (1) 3 + 9 + 27 + 81 + 243 + 729 + 2187 is calculated by dislocation subtraction method

3+9+27+81+243+729+2187
=(3+2187)+(9+81)+(27+243)+729
=2190+90+270+729
=2280+999
=3279

Dy / DX = XY / (x ^ 2 + y ^ 2) special solution for y = 1, x = 0

So u + XDU / DX is the U + XDU / dxu / DX = u / U / dxu / DX = u / (U / (1 + U \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\;) = cxx / y * e ^ (X & # 178

How many cubic meters is a ton of corn equal to
Now I know the diameter of the cylinder, and the volume of the cylinder is 3500t / bin. I want to know how many cubic meters it is

The classification of national corn is mainly based on the unit weight. The unit weight of grade I corn is 710 g / L, and I have seen 760 g / L, which is of good quality. For example, the unit weight of northeast corn is 600 g-680 G after drying
Based on 700 g / L, 1 cubic meter of water equals 1000 - 700 kg / m3
1 ton is 1000 kg / 700 = 1.1.5 cubic meters