... =
Lucpb@yahoo.com
ĐỀ ÔNTHI SỐ 11
Bài 1:Cho:
2
1 1 1
2
2 1 1
x x x
B
x x x
− +
= − −
÷ ÷
÷ ÷
+ −
a. Rút gọn B
b. Tìm x để B > 0
c. Tìm x để B = 2
Bài 2: Dự tính phát đều 280 ... I,J.CMR:FI.FJ = FD.FE
Bài 6: a. Tính:
( ) ( )
4 15 10 6 4 15A = − + +
b. Giải pt sau:
2
2
9 11 3
0
25 5 5
x x
x x
+ − − =
÷
Lucpb@yahoo.com
ĐỀ ÔNTHI SỐ 6
Bài 1:a. Cho
3 4 12 25 75A x x x= ... CMR: J; M; N thng hng
Bi 6: a.Tớnh: A =
( ) ( )
10 2 6 2 5 3 5+ +
11 4 7 11 4 7B = +
b. Tỡm GTNN:
2
2 2 9A x x= + +
Lucpb@yahoo.com
ĐỀ ÔNTHI SỐ 13
Bài 1: Cho:
4 8 1 2
:
4
2 2
x x x
B
x
x...
... Ñeà thi tuyeån lôùp 10 soá 1
I Choose the word which has the underlined part pronounced differently from the ... B. telephones C. phones D. dials
9/ A new washing machine will be …………this afternoon
A. placed B. put C. set D. installed
10/ Scientists are looking for an effective way to reduce energy……………………….
A. ... taken separately to a special factory which turns
dirty old cans into high quality steel. It’s this steel that may well find its way back into your home in the
form of knives and forks, garden...