-
Anonymous users2024-02-05Solution: y = x +bx+8 Translate three units to the right to get y = (x-3) +b(x-3)+8
Translate it down by 2 units to get y = (x-3) +b(x-3)+8-2 because. x-3)²+b(x-3)+8-2
x²-6x+9+bx-3b+6
x²+(b-6)x+15-3b
Compared with y =x -2x+3, we can get b=4 satisfied, please ask if you don't know.
Sort out knowledge, help others, and enjoy yourself.
Welcome to the "Mathematics and Physics Infinity" team.
-
Anonymous users2024-02-04y=(x-1) 2+2 Translate 2 units upwards first.
We get y=(x-1) 2+4
Move another 3 units to the left.
We get y=(x+2) 2+4
So b=4
-
Anonymous users2024-02-03No matter how you move. It should all be for the x variable. Keeping this in mind, everyone else answered. I don't say it ominously.
-
Anonymous users2024-02-02Because the vector a=(sin,-2) and the vector b=(1,cos) are perpendicular to each other, sin -2cos = 0
And because sin 2+cos 2=1=5cos 2 and belongs to (0, 2).
The solution yields cos = 5.
Because 5cos ( -5cos cos +5sin sin = 5cos +2 5 sin = 3 5 cos
So sin = cos
And because 0 is less than less than 2, so sin = cos = 2 2
So sin( +sin cos +sin cos =3 10 10.
If you have any questions about my problem, you can use Hime
I will definitely reply as soon as possible!
-
Anonymous users2024-02-01If you have any questions about my problem, you can use Hime
I will definitely reply as soon as possible!
-
Anonymous users2024-01-31Use method a:
A total of 80000 1000 * 3 = 240 yuan to use method b:
80000 1000 * 40 * 4% = 3200 * yuan Obviously, the premium invested by A is greater than that of B, therefore, the insurance of B is selected.
-
Anonymous users2024-01-30If type A needs to pay 80000 1000 * 3 = 240 yuan.
If type B is equivalent to paying 80,000 1,000 * 40 * 4% = 128 yuan.
Obviously B is more cost-effective.
-
Anonymous users2024-01-29If you use the first option, you need to pay an insurance premium of 240 yuan, and if you use the second option, you need to pay an insurance premium of 3200 yuan, but you can recover it after one year.
Now let's say you have 240 + 3200 = 3440 yuan. If you use the first one, then after a year you can get 3200 + 3200 * 4% = 3200 + 128 = 3328
If you use the second option, then after a year you have 240 (1+4%) + 3200 = so you should still choose the second option.
-
Anonymous users2024-01-28(1) The speed at which the river water flows into the test water level is x m h, and the rate at which the water level can drop by the flood discharge of each gate is y m h
2x - 2y =
4x - 2 x 4y =
Solve x =
y = (2) assumes h hours are required.
5 x x h - x h - = 0(3) assumes z are needed.
6 x x z - x 6 - = 0
-
Anonymous users2024-01-27The question is better to pay more attention to yourself.
-
Anonymous users2024-01-26The process is as follows: y=
x+2/(x-5)= -
5-x2/(5-x)】+55-x
x）≥2√2∴y≤5
Therefore, when x5, there is a maximum value of 5-2 2
-
Anonymous users2024-01-25I really hope I can help lz. Please lz give the full question.
If the topic is like this, then it can only be discussed in a number of cases: (1) a>0 b>0 c>0
a>0 b=0 c>0
a>0 b=0 c<0
a>0 b>0 c=0
a>0 b>0 c<0
2)a<0 b=0 c>0
a<0 b>0 c>0
a<0 b=0 c>0
a<0 b=0 c<0
a<0 b>0 c=0
a<0 b>0 c<0
3)a=0 b=0 c>0
a=0 b>0 c>0
a=0 b=0 c>0
a=0 b=0 c<0
a=0 b>0 c=0
a=0 b>0 c<0
Hope it can help lz...
-
Anonymous users2024-01-24Only one is required to draw, this is a parabolic diagram y=ax 2+bx+c, and all points y values are required to be less than 0, so draw a parabola chart with the opening facing down (i.e., a<0 at this time), and the maximum value is less than 0 (that is, the highest point is below the x-axis, and c<0 at this time) is OK,
-
Anonymous users2024-01-23The parabolic opening is downwards and does not intersect with the x-axis.
-
Anonymous users2024-01-22The plus or minus of a is unknown, and the direction of the opening is unknown.
-
Anonymous users2024-01-21It's not a function, it's an inequality, how can there be an image?
Set up x yuan. For every price increase, 10 pieces are sold less. >>>More
I also thought about this problem when I was in high school, first of all, the front multiple-choice questions should be done quickly, the method should be used flexibly, and it is not necessary to do the whole process, you can use a special method to bring in the method and a series of quick practices, and then fill in the blanks as much as possible, basically send points in front, there are two difficult points in the back, the first 2 questions of the big topic are very basic to ensure that they are all right, and the big questions behind should have the concept of step-by-step scoring, don't look at the type of question that you have not seen it and feel that it is difficult to have no confidence, the first few steps can still be scored, The next few steps are written to where it counts, and this is a score. In general, we should pay attention to the foundation, ensure that the basic score is not lost, the time should be allocated well, if the level of multiple-choice questions is good in 30 minutes, generally, about 40, fill-in-the-blank questions should have 30 minutes to do, and then there is about an hour, the first 2 big questions are 15 minutes, and the rest of the time try to do the rest of the questions! >>>More
3 people spent a total of 9*3 27 yuan; The 2 yuan taken by the waiter is actually 3*9=27 yuan; The boss received 25 yuan, and the waiter took 2 yuan and earned 25 yuan + 2 yuan 27 yuan, so for the customer, they paid 9 yuan for the accommodation, so 3 x 9 yuan = 27 yuan + returned) 3 yuan = 30 yuan; For the boss (paid by the customer) 30 yuan - the waiter hid it) 2 yuan - (returned by the waiter) 3 yuan = (actual income) 25 yuan; For the waiter (paid by the customer) 30 yuan - (returned to the customer) 3 yuan - (handed over to the boss) 25 yuan = (the waiter hid) 2 yuan expenditure There is no problem with income.
f(x)=x+a x g(x)=x-lnx xe[1,e] f(x1)>=g(x2) That is, f(x) must be greater than or equal to the maximum value of g(x) is the minimum value of f(x) and greater than or equal to the maximum value of g(x). >>>More
Haha: Being able to survive until freshman year means that your current state will not be what you think. The situation is often not as bad as you think. You may not have noticed it, but in fact, there must be beautiful things that you should cherish and cherish over the years. >>>More