1-10 / 3x = 1 / 4 (solving equation)

1-10 / 3x = 1 / 4 (solving equation)

1-3 / 10 x = 1 / 4
3x/10=1-1/4
3x/10=3/4
x=3/4*10/3
x=5/2

It is known that proposition p: "for any x belonging to [1,2], there is x > = a", proposition q: "there exists x belonging to R, such that x + 2aX + 2-A = 0 holds". If proposition "P and Q" is a true proposition, then the value range of real number a is

Proposition p: a ≤ X & # 178;, then a ≤ [x & # 178; minimum value 1 on interval [1,2], then:
a≤1
Proposition q: if the equation x & # 178; + 2aX + 2-A = 0 has a solution, then: △ = 4A & # 178; - 4 (2-A) ≥ 0, we obtain that:
A ≤ - 2 or a ≥ 1
1. If P is true and Q is false, then: [a ≤ 1] and [- 2]

The formula is simple (15.6 + 80 * 75%) / 12% 1.87/5% - 3.14 * 5 (1-4 / 1 + 2-6 / 5) * 12

(15.6+80*75%)/12%=15.6*3/25+80*3/4*3/25=46.8/25+180/25=226.8/25
1.87/5%-3.14*5
=1.87*100/5-15.7
=187/5-15.7
=37.4-15.7
=21.7
（1-1/4+2/3-5/6)*12=12-3+8-10=7,

If the chord length of the line L with slope 1 cut by circle x2 + y2 = 4 is 2, then the equation of the line L is______ ．

Let the equation of a straight line be y = x + B, and the distance from the center of a circle to the straight line be d = | B | 2. Then, from the square of the radius equal to the sum of the square of the distance from the center of a circle to the straight line and the square of half the chord length, we get (| B | 2) 2 + 1 = 4, and the solution is b = ± 6, so the answer is y = x ± 6

A sample contains 20 data: 35, 31, 33, 35, 37, 39, 35, 38, 40, 39, 36, 34, 35, 37, 36, 32, 34, 35, 36, 34______ 5 to 34. 5______ ．

According to 40 − 312 = 4.5, it should be divided into five groups. The data before 32.5 to 34.5 are 33, 34, 34, 34, so the frequency is 4.5

On the problem of generating power series of function of higher number
When a function is expanded into a power series, if it is derived and integrated again, why does the integral limit have to be 0 to x, 1 to x

As long as you can work out the original function, the integral limit is only a formal thing. The lower limit is 0, which makes it easier for you. Theoretically, 1 to X is OK

65 minutes=______ Hours & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 92cm=______ Rice

65 minutes = 1112 hours, 92 cm = 0.92 m, so the answer is: 1112, 0.92 M

If non-zero real number A.B, (a not = 0) satisfies x ^ 2 + x-2007 = 0, then how much is one of a and one of B

A+B=-1
A*B=-2007
1/A+1/B=(A+B)/AB=-1/(-2007)=1/2007

The quotient of a number divided by its reciprocal is one sixth. What is the number

X △ 1 / x = 1 / 6
X & # 178; = 1 / 6
X = ± 6 / 6 root sign 6

Addition and subtraction of integers of merging similar terms
Merge similar items: 1, - x-x = 3a-6a + a = - 6x ^ 2-3x ^ 2 + 8x ^ 2 = 1 / 2xy-2 / 3xy=
2. If the length of a rectangle is 2a and the width is 1 / 2a, the perimeter is_ 3. If n is a positive integer, then three consecutive odd numbers are 2N-1, -, 2n + 3, and the sum of them is -. 4. If the polynomial x ^ 4-kx ^ 3Y + 2x ^ 2y-3x ^ 3Y + y ^ 4 contains NO x ^ 3Y term after merging, then K is equal to -

1: - 2x 2: - 2A 3: - 6x ^ 2-3x ^ 2 + 8x ^ 2 = 8x ^ 2-6x ^ 2-3x ^ 2 = - x ^ 2 4: - 1 / 6xy 5: perimeter: (2a + 1 / 2a) x2 = 5A 6: let n be an even or odd number, the resulting numbers are: 2n + 1 and: 6N + 34: k = 3 or - 3, because: k = 3 or - 3, plus minus sign is - 3 or 3, and - 3x ^ 3Y merges the similar terms as - 3x ^ 3y-3x ^