cho ba so duong 0 nho hon hoac bang a nho hon hoac hoa bang b nho hon hoac bang c nho hon hoac bang 1 . chung minh a/bc+1+b/ac+1+c/ab+1nho hon hoac bang 2

Tim x biet:

A. (x-3/4).(3x+1/2)lon hon hoac bang 0 

B. (2x+1).(4x+3)be hon hoac bang 0

Cho A = /x-1/ + / x-11/

Tinh A khi 1 nho hon hoac bang x nho hon hoac bang 11

cho ba so a,b,c thoa man 0be honhoac bang a be hon hoac bang b+1 be hon hoac bang c+2 va a+b+c=1 tim gia tri nho nhat cua c

Tïm n thuoc N sao cho

a) 24 : het 2n - 1(n lon hon hoac bang 1)

b) 4n - 7 : het 2n - 1 (n lon hon hoac bang 1)

cho a la mot so nguyen .Chung to rang :a² lon hon hoac bang 0;-a² be hon hoac bang 0

tinh tong cac so nguyen a sao cho:

-50<a<hoac bang 50

-100 nho hon hoac bang a va a nho hon 100

1.     cho 4 stn a lon hon hoac bang b, b lon hon hoac bang c, clon hon hoac bang d.

CM:(a-b)(a-c)(a-d)(b-c)(b-d)(c-d)

2.      CM: co the tim dc 1 stn k sao cho: (1997^k)-1 chia het cho 10^4

3.      tong cac chu so cua 1 so chinh phuong co the bang 1995 dc k?

4.      tong cua 1995 stn khac 0 dung bang 1995. Hoi UCLN cua chung la bao nhieu?

cho diem a nam trong hinh tron (0;4cm)

thì oa se lon hon hay be hon

lon hon hoac bang

be hon hoac bang

NHANH MK K MK SẮP OF RỒI