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l(f)rg:2017-11-25 ݋:bin

1.X~3 * y = 10 ~6 (y > 1), X c 10~2ȴС

⣺x=10~2/y~1/3y>1ty~1/3>1 ߀10~2xB

2.xĂx헲3x

xE7-x(sure)

3.Уa1=3, a2=6, a(n)= a(n-1)/a(n-2) a(150)=?

⣺3, 6, 2, 1/3, 1/6, 1/2, 3, 6, (ÿ6һѭh(hun)𰸑ԓ1/2)

һ汾

ǰˎ׽`,ҵǣa1=2, a2=6, an=a(n-1)/a(n-2), a150

2, 6, 3, 1/2, 1/6, 1/3 , 2, 6, 3, …ҵĴ1/3

(ҿA1ֵԼД)

4. 125w+25x+5y+z=264,x,y,z,w,are nonnegative integrate,and no more than 5,what is w+x+y+z?

⣺ö̳256Mƾ2024tõx+y+z+w=2+0+2+4=8

5.a * xƽ+B*X+k=0(ab֪kδ֪)oһXֵһ

KٽX2

6.a,b,c,-5,-10ƽa,b,c,5,10ƽ֮Ƕ?

⣺ڿrlǰ -6 ҲS6

7. F(X)=22X-1 F(3+X)F(3-X)

⣺210η

8.-7<=x<=5-5<=y<=3x^2-y^2ֵ?

⣺X= -7 Y= 0 r 49

9.ЂʽҪMN֮gQıĔжق?

ʽǣ [(ԓQ󱶔-ԓQС)/Q ] +1

ɂ@ӵ}̝@ʽҪȻM

10.һ9x1+x2+x3,12x2+x3,t@ٞ?ܱx1?

𰸣369(x1+x2+x3)=12(x2+x3) x1=3(x2+x3)……..

11.a1,a2,...a10.˵һĸ헶ǰһ헵1/2 ֪a10 >0.01

(1) a1>5 (2)a1>10 (3)a1ǂeven integer.

x: 1.H(1)() a10=a1~9>1/100

12.XYZƽMZXYMıʾ

Z=3M-(X+Y)

13. MNM+NcMN^

𣺲_

14.Y=Y+1/Y(9)c10^

10

15.X0X+̖X 2ĸ̖X^

(䌍Xc̖X^)o^

16.X,Y, 1=

⣺x=8_ʼһֱx=1,8+7+6+5+4+3+2+1=36 Դ36

17. 4X+7Y=39XYϗlЎׂc

𰸣2(Bx)քe(15)(81)

18. 6+X<15,6+Y<15XYȴС(No1)

ȻDz_

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