-
Anonymous users2024-02-11,a1=2.
a5=2*3^4=162.
19.Let the three numbers be 5-d, 5, 5+d, according to the meaning of the title 5(5-d)(5+d)=80,25-d 2=16,d 2=9,d=earth3, these three numbers are 2,5,8 or 8,5,2...
20.Set the percentage of price reduction to q, according to the topic.
q^2=,q>0,∴q=
-
Anonymous users2024-02-101.Subset staring oak: the symbol next to the empty set of Kailing, {a},, the true Wang trace subset: the symbol of the empty set, {a},,b,c}
-
Anonymous users2024-02-091.Proof: x 2+x+1=x 2+x+1 4+3 4=(x+1 2) 2+3 4 3 4
x^2+x+1>0
2.Proof: x 2-2x+1+y 2-4y+4=(x-1) 2+(y-2) 2
x-1) 2 0 (y-2) 2 bending leakage ruler 0 (x-1) 2+(y-2) 2 buried high dust 0x 2+y 2-2x-4y+5 0
-
Anonymous users2024-02-081.From the vertex coordinates, we can see that y=a*(x-2) 2-3, substituting the point (1,-5), we can know that a=-2, then the analytic formula is: y=-2(x-2) 2-3=-2x 2+8x-112Let the expression be: y=ax 2+bx+c, and substitute the point to get :
C=-2---1.
a+b+c=-4---2.
4a+2b+c=4---3.
Multiply the above 3 equations by (2 equations) by 2 to get: a=(12+c) 2=5 Substitute the values of a and c into 2 equations to obtain: b=-7
The analytic formula is: y=5x 2-7x-2
-
Anonymous users2024-02-071. Let the analytic formula be y+3=k(x-2) 2 and substitute (1,-5) to obtain k=-2,y=-2(x-2) 2-3=-2x 2+8x-11
2. Let y=ax 2+bx+c, and point a(0,-2), b(1,-4), and c(2,4).
c=2a+b+c=-4
4a+2b+c=4
a=7, b=-13, c=2
y=7x^2-13x+2
-
Anonymous users2024-02-06Solution: The circumference of the vehicle tire l=2 r=2*m.
If you turn 96 times in one minute, then the number of turns you turn in an hour a=60*96=5760 turns.
The total distance s=a*l=11520 meters.
There is a post on the forum for high school students, check it out for yourself.
Yuan. Yuan 500 + 1600 = 2100 yuan.
3.Set up grandpa to Lele x yuan. >>>More
Summary of Mathematics Knowledge Points in Senior 1:
Preliminary Stereo Geometry: >>>More
There are many skills to master in the workplace, and communication is a hard skill. The importance of communication is obvious, whether it's working with colleagues or reporting to a leader. Oda joins the company with Zhang. >>>More
There are seven main accounting tasks: 1. Prepare accounting vouchers according to the original vouchers that are audited and correct; 2. Register various sub-accounts, regularly prepare a summary table of accounting vouchers, and register the general ledger according to the summary table of accounting vouchers; 3. At the end of the month, make accrual, amortization, profit and loss carry-forward vouchers; 4. Cost accounting; 5. Prepare accounting statements; 6. Archiving and keeping of accounting files; 7. Financial analysis work Accounting school provides different online introductory advanced courses and programs for different types of students, as well as the old accountant real-time ** to answer your various questions, help your accounting learning, more than 120 industry real account practice, there are questions to answer, so that you can learn the work really needs more comprehensive, more solid knowledge points, online classes can be learned at any time 24 hours a day, time-saving and convenient, are live broadcast, interactive Q&A, no need to run around, miss class....