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
ΣKٽX2
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_