If the solution set of inequality ax & # 178; + BX + C > 0 is {x | - 1

If the solution set of inequality ax & # 178; + BX + C > 0 is {x | - 1

Ax & # 178; + BX + C = 0, two of the equations are - 1,2 and a
The solution set of ax & # 178; + BX + C > 0 is: - 1
Given that the solution set of inequality ax & # 178; - bx-c < 0 is (2,3), find the solution set of inequality CX & # 178; - bx-a > 0
Because the solution set of inequality ax & # 178; - bx-c < 0 is (2,3), the image opening of function f (x) = ax & # 178; - bx-c is upward a > 0, and because the solution of equation AX & # 178; - bx-c = 0 is x = (B ± radical (b ^ 2 + 4ac)) / 2a, so B ± radical (b ^ 2 + 4ac) > 0b > radical (b ^ 2 + 4ac), that is B ^ 2 > b ^ 2 + 4ac
If the solution set of quadratic inequality AX2 + BX + 1 ＞ 0 is {x | - 1 ＜ x ＜ 13}, then the value of AB is ()
A. -5B. 5C. -6D. 6
The solution set of ∵ inequality AX2 + BX + 1 ＞ 0 is {x | - 1 ＜ x ＜ 13}, ∵ a ＜ 0, ∵ the original inequality is equivalent to - ax2-bx-1 ＜ 0. According to Weida's theorem, - 1 + 13 = - BA, - 1 × 3 = 1a, ∵ a = - 3, B = - 2, ∵ AB = 6
3x+5y=?+7x
Pull it fast. It needs to be detailed
It's weird
=-4X+5y
I think it's a conventional way of thinking
Z
5y-4x
The relationship between X and Y
?=5y-4x
Subtract 7x from both sides of the equal sign
3x+5y-7x=?+7x-7x
3x-7x+5y=?
-4x+5y
5y-4x
Or you have to know the relationship between X and y
?=5y-4x
1. From the above formula, we can get 5Y =? + 4x
2. Put 5Y =? + 4x into the formula
3. It is concluded that 3x +? + 4x =? + 7x
4. So? = 0
5. The person who worked out this problem is too clever! ha-ha
5y-4x
Circumference formula of semicircle
Circumference of semicircle = radius * (PI + 2)
π*r +2r=(π+2)r
C half = π D △ 2 + D
Circumference of semicircle = half of circumference of circle + diameter
πr+2r
Radius × (π + 2)
Circumference of semicircle: 5.14 * radius. (pi = 3.14).
C=π×d÷2
Semicircle circumference = total circumference divided by two plus diameter
Wu R + 2R is the ratio of circumference (3.14) times radius plus 2 times radius
Circumference of semicircle = π * r + 2R = (π + 2) r
√4a²b³=?
Solution: the original formula = - 2A ^ 2B * 3AB ^ 2C + 2 ^ 2B * 2B ^ 2C
=-6A ^ 3B ^ 3C +4 ^ 2B ^ 3C
Br / > I'm glad to answer for you. I wish you progress in your study! I don't know if I can ask you!
What is the basis of "merging the similar terms" of linear equation of one variable? What is the basis of "coefficient to 1"?
Remove the denominator and change the coefficient to 1 → equality property: if both sides of the equation multiply or divide by a number (the divisor is not 0), the equation still holds
Remove brackets, merge similar terms → multiplication distribution law and its inverse operation
Transfer term → equality property: if a number or formula is added or subtracted from both equations, the equation still holds
Let a = {y y = (x power of 3), X ∈ r}, B = {y y = (square of x) x ∈ r}, then a ∩ B =?
It's Y > 0, because in a, Y > 0 can't be equal to 0; in B, y is greater than or equal to 0, so communication is Y > 0
A∩B=A
If we know that the power of [A's nth power-1] times B's 4th power is the same as the power of polynomial X's 3rd power + 4x ^ 3Y ^ 4-2y ^ 5, then what's n? What's the degree of this monomial
[a to the power of n-1] times B to the power of 4
=The nth power of a, the 4th power of B - the 4th power of B
The degree of the original formula is n + 4
The power of X + 4x ^ 3Y ^ 4-2y ^ 5 is 7
Same number of times N + 4 = 7
So: n = 3
How is the circumference formula of a circle derived?
Use a few words, or use graphics to show me. You can also use graphics and a few words
In the primary school, the teacher actually measures the circumference of several circles of different diameters (which can be made of iron wire, copper wire, etc.) (expand it into a straight line to measure the length). Finally, through induction and making some necessary explanations, the formula of the circumference of the circle is obtained. There are many ancient circumferences measured by circle cutting, you can find them. I hope my answer is helpful to you!
This is the definition. The ratio of perimeter to diameter is defined as pi, so perimeter equals PI times radius. How do you get it?
This is the definition. The ratio of perimeter to diameter is defined as pi, so perimeter equals PI times radius. How do you get it?