Urgent!! Math Problems!! Please come in!!

The condition is not one less.

Whether the conditions are complete or not, is point e arbitrary?

4×5+1=21...

By the way, how old are you?

The triangle arp is similar to the triangle prq

So pr:qr=ra:pr

So PR 2=qr*ra

So z = x*y

The second question is 120 degrees, tangent negative root number three.

One is 75 degrees, tangent 2 plus root number 3

One is the outer angle, which is 150 degrees tangent minus thirds of the root number 3 and the third question will not.

(1) As shown in Figure 1, PAB= QPR=30°, Pra= PRQ, APB= PQR, so ΔAPR is similar to ΔPRQ, and is proportional to the corresponding side of the similar triangle, so: PR QR=AR PR---Z 2=X*Y

The second type: when pab=30° is the apex angle of an isosceles triangle: 2+ 3(3) According to the title: the function of y and x is analytically formulated: y=z x The definition domain is: x+z x>2-z

x+z²/x<2+z

1 question, 2:140=5:x, x=350

Question 2, the original alloy has 30 grams, so the original copper has 30 * (2 5) = 12, and the zinc has 30-12 = 18, so the mass ratio of the new alloy to zinc is 12:24=1:2

3 questions, added 2* *9=

4 questions, the base area is 800 16 = 50, and the volume of the remaining part of the inverted space is 50 * 4 = 200

So it can be loaded up to 1000 mg.

The unit price of electricity does not exceed 140kwh, and it is 50 yuan for 125 yuan.

The excess part should be more imitation land sedan car (88-172 * yuan.

Therefore, the unit price of the excess part is yuan.

The number of days is about 75 days.

Let the number of days be a, 10*2 (a 5) = 330,000.

10*2 15 is about equal to 330,000.

A is approximately equal to 75

In recent years, our rural areas have undergone earth-shaking changes.

In the past, there was a barren grassland opposite our school, but now there is a new farmer's village.

Look at the rows of white and neat buildings, compared with the houses in the city. There is a small river in front of the new village, which used to be a stinky ditch full of garbage, but now the river is not only crystal clear, but also has several small waterfalls built in the small river according to the height difference of the river, and a beautiful harmony bridge has been built on the small river. Because the people here are very hardworking and friendly, and there is a harmonious scene.

Walking across the Harmony Bridge and walking through the tree-lined streets, you can't tell if you're in the countryside or the city. Behind the new countryside is a small park, where there is a row of fitness equipment among the trees and flowers, where we can exercise while breathing fresh air. There's also a nice basketball court, where we often go to play basketball after school, and beyond that there's a small hill with verdant greenery.

Up a row of stone stairs, we reached the top of the slope, where there was a pavilion that looked like a sentry standing guard on the top of the hill for our new village.

It should be 10*2 (d 5)=330000 d is the number of days.

D is approximately equal to 75

The formula for the final value of compound interest can be applied to s p(1 i) n

The final value is 330000

The initial value is p=10

Interest rate i = 100% = 1

If the interest period is n, if it takes x days, then x 5n

Therefore, 10*2 n=330000

2^n=33000

To solve the logarithmic equation, n = 15, x = 75

Can't see clearly, 1Just find f[2], f(30)=f[2]+f[3]+f[5]-2=4

For n》=2, f[n]>=2, otherwise =1, then (1)f(n k)=1Contradiction.

f[2]=2

2.Let f(1)=1, f[f[1]]=3, contradictory. f[1]=a>=2,2<=f[1]f[1]=2,f[2]=

f[2*3 n]=3 n+1, f[3 n]=2*3 n, note: 3 n-2*3 n has 3 n numbers, and value one has 3 n numbers, there are increments, 0"=m =3 n, f[3 n+m]=2*3 n+m

4.Transform f[x]=f[x]-1,(2) f[x]+f[y]=f[x+y], for x integers, rational numbers, real numbers only f[x]=kx, have[1],k=-1

5.Not sure, let f(x)=2 x,6

f(0)=-1,f(2)=4=2f(1)+2,f(1)=1.

f(y+1)=f(y)+2+y, derecursively, get f(x).

Solution: Let the possible output of the new product be x units.

5000≤x≤12000

5x≤2000+25000

12x≤2000*48

Solve 5000 x 5400

A: It should be between 5000 and 5400 units.

**Department (2000+25000) 5=5400 units.

Personnel Department 2000*48 12=8000 units.

Limited by the first part, up to 5,400 units will be produced.