bài 2
a 7/2
b 29/11
c 29/7
d -13/5
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cho 2 phan so 4/4 va 6/7 tu 2 phan so da cho lap 1 phan so thu ba bang cach ;tu so la tong cac tu so cua 2 phan so da cho ,mau so la tong cac mau so da cho.Hay so sanh ba phan so do voi nhau va xep chung theo thu tu tang dan
Cau 1 : cho 3 duong thang doi 1 cat nhau tao thanh 3 giao diem phan biet .Hoi co bao nheu tia co goc la 1trong 3 giao diem doCau 2: Ve n tia phan biet chung gốc . Biet rang tren hinh co 36 góc .Tìm nCau 3: tim p/s bang 20/39 .Biet UCLN cu tu va mau nau bang 36Cau 4 : Tap hop gia tri x thoa man |x+3|+|x+4|1Cau 5: Trong 1 buoi giao luu van nghe , h/s nu chiem 2/5 ,trong do co 3/8 la h/s lop 6.Trong so h/s nam co 2/9 la hoc sinh lop 6. Tinh so h/s lop 6 .Biet so h/s trong khoang tu 130 den 200Cau...
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Cau 1 : cho 3 duong thang doi 1 cat nhau tao thanh 3 giao diem phan biet .Hoi co bao nheu tia co goc la 1trong 3 giao diem do
Cau 2: Ve n tia phan biet chung gốc . Biet rang tren hinh co 36 góc .Tìm n
Cau 3: tim p/s bang 20/39 .Biet UCLN cu tu va mau nau bang 36
Cau 4 : Tap hop gia tri x thoa man |x+3|+|x+4|=1
Cau 5: Trong 1 buoi giao luu van nghe , h/s nu chiem 2/5 ,trong do co 3/8 la h/s lop 6.Trong so h/s nam co 2/9 la hoc sinh lop 6. Tinh so h/s lop 6 .Biet so h/s trong khoang tu 130 den 200
Cau 6: ti so cu hai so bang 2:7 neu them 35 vao so thu 1 thi ty so giua 2 so =11:14. Tinh so > hon
Cau 7 : So phan tu cua tap hop x thoa man
11-x+|x+2|=0
cau 8: 1 o to di quang duong AB voi van toc 40km/h luc ve di voi van toc 50 km/h . Time ca di lan ve =4h30 .tinh AB
Cau 9 : Can it nhat bao nhieu diem de khi noi lai ta duoc 4hinh tam gia
Minh viet tat nen hoi kho doc
ban nao giai duoc bao nhieu cau thi duoc bay nhieu tick
Sap xep cac phan so sau theo thu tu tang dan
5/12 -15/27 -1/2 1/3 7/18 -11/33
moi nguoi giup toi voi........cho ket qua thoi nha1. gia tri x+y+z biet :lx-5l+ly-4l+lz-4l02.so cac uoc nguyen duong cu 2^6.3^33.so cac uoc nguyen duong cua 184.so duong thang tao thanh boi 8 biem phan biet doi mot khong thang hang5.so tu nhien n thoa man 2^n+1:4^210246.UCLL(12,18,24)7.so tu nhien n thoa man 2+4+6.......+n1108.tim x 576.15:x5409.gia tri a+b+c bieta+b10,a+c25,b+c25so phan tu cua tap hop A cac so le nho hon 23
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moi nguoi giup toi voi........cho ket qua thoi nha
1. gia tri x+y+z biet :
lx-5l+ly-4l+lz-4l=0
2.so cac uoc nguyen duong cu 2^6.3^3
3.so cac uoc nguyen duong cua 18
4.so duong thang tao thanh boi 8 biem phan biet doi mot khong thang hang
5.so tu nhien n thoa man 2^n+1:4^2=1024
6.UCLL(12,18,24)
7.so tu nhien n thoa man 2+4+6.......+n=110
8.tim x 576.15:x=540
9.gia tri a+b+c biet
a+b=10,a+c=25,b+c=25
so phan tu cua tap hop A cac so le nho hon 23
1.cho dãy số 6;7;9;12;16;.... số thứ 100 của dãy số trên là2.cho day so 2,3,5,9,17,33,65,129,... Tim so thu 11 cua day3 .tim 2 phan so biet tich cua chung 8/15 .Biet cong them 4 vao phan so thu nhat thi tich hai phan so la 56/154.a chia 4 du 3;a chia 9 du 5 .Hoi a chia 36 du bao nhieu5.tim(x;y) biet -|2x+4| -|y+5| lon hon bang 0 .Tim cap (x;y)6.cho phan so a,b toi gian .chung minh 1-(a/b) toi gian7.so sanh tong s1/2+2/2^2+......+2015/2^2015 voi 28.tim a nho nhat sao cho khi chia a cho 7du 4 ,ch...
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1.cho dãy số 6;7;9;12;16;.... số thứ 100 của dãy số trên là
2.cho day so 2,3,5,9,17,33,65,129,... Tim so thu 11 cua day
3 .tim 2 phan so biet tich cua chung =8/15 .Biet cong them 4 vao phan so thu nhat thi tich hai phan so la 56/15
4.a chia 4 du 3;a chia 9 du 5 .Hoi a chia 36 du bao nhieu
5.tim(x;y) biet -|2x+4| -|y+5| lon hon bang 0 .Tim cap (x;y)
6.cho phan so a,b toi gian .chung minh 1-(a/b) toi gian
7.so sanh tong s=1/2+2/2^2+......+2015/2^2015 voi 2
8.tim a nho nhat sao cho khi chia a cho 7du 4 ,cho 11 du 6 ,cho 17 du 9
9.tim so tu nhien a va b ,a-b =5 va (a,b)/[a,b]=1/6
10. 3x+3x-1+3x-2=1053
11.5.36^9.4^6 -2.12^14.3^6/5.2^28.3^19-7.2^29.3^18
12.tìm n để n^2-7 chia hết n+3
13.2.2+4.4+6.6+....+98.98
Bai 1:Tim tat ca cac phan so bang phan so 34/51 co mau so tu nhien nho hon 13.
Bai 2:Tim va lap cac cap phan so bang nhau ma tu va mau dung 4 trong 5 so:2;4;8;16;32.
Cho cac so nguyen duong a,b,c,x,y,z1, Biet 1/a 3/b + c 5/c + a. Hay rut gon phan so A a/2b - c2. Biet a/b 2b/cc 4c/a. Hay rut gon phan so B ab + bc + ca/a2 + b + c23. Biet x/a y/b z/c. Hay rut gon phan so C x*y*z*(b+c)*(c+a)*(a+b)/a*b*c(y+z)*(z+x)*(x+y)4. Biet ab/a + 2b 2/5; bc/b + 2c 3/4; ca/c +2a 3/5. Hay rut gon phan so D abc/ab+bc+ca5. Biet 3/a -4b 5c. Hay rut gon phan so E 3bc + ab - 4ac/6bc - 8ac -abGiup minh nhe! Ai lam duoc va dung cho tick.Thanks cac ban
Đọc tiếp
Cho cac so nguyen duong a,b,c,x,y,z
1, Biet 1/a = 3/b + c = 5/c + a. Hay rut gon phan so A = a/2b - c
2. Biet a/b = 2b/cc = 4c/a. Hay rut gon phan so B = ab + bc + ca/a2 + b + c2
3. Biet x/a = y/b =z/c. Hay rut gon phan so C = x*y*z*(b+c)*(c+a)*(a+b)/a*b*c(y+z)*(z+x)*(x+y)
4. Biet ab/a + 2b = 2/5; bc/b + 2c = 3/4; ca/c +2a = 3/5. Hay rut gon phan so D = abc/ab+bc+ca
5. Biet 3/a -4b = 5c. Hay rut gon phan so E = 3bc + ab - 4ac/6bc - 8ac -ab
Giup minh nhe! Ai lam duoc va dung cho tick.
Thanks cac ban
Cho cac so nguyen duong a,b,c,x,y,z1, Biet 1/a 3/b + c 5/c + a. Hay rut gon phan so A a/2b - c2. Biet a/b 2b/cc 4c/a. Hay rut gon phan so B ab + bc + ca/a2 + b + c23. Biet x/a y/b z/c. Hay rut gon phan so C x*y*z*(b+c)*(c+a)*(a+b)/a*b*c(y+z)*(z+x)*(x+y)4. Biet ab/a + 2b 2/5; bc/b + 2c 3/4; ca/c +2a 3/5. Hay rut gon phan so D abc/ab+bc+ca5. Biet 3/a -4b 5c. Hay rut gon phan so E 3bc + ab - 4ac/6bc - 8ac -abGiup minh nhe! Ai lam duoc va dung cho tick.Thanks cac ban
Đọc tiếp
Cho cac so nguyen duong a,b,c,x,y,z
1, Biet 1/a = 3/b + c = 5/c + a. Hay rut gon phan so A = a/2b - c
2. Biet a/b = 2b/cc = 4c/a. Hay rut gon phan so B = ab + bc + ca/a2 + b + c2
3. Biet x/a = y/b =z/c. Hay rut gon phan so C = x*y*z*(b+c)*(c+a)*(a+b)/a*b*c(y+z)*(z+x)*(x+y)
4. Biet ab/a + 2b = 2/5; bc/b + 2c = 3/4; ca/c +2a = 3/5. Hay rut gon phan so D = abc/ab+bc+ca
5. Biet 3/a -4b = 5c. Hay rut gon phan so E = 3bc + ab - 4ac/6bc - 8ac -ab
Giup minh nhe! Ai lam duoc va dung cho tick.
Thanks cac ban
Bai 1
3 nguoi cung lam mot cong viec,neu lam rieng nguoi thu nhat mat 4 gio,nguoi thu hai mat 5 gio, nguoi thu ba mat 6 gio.Hoi neu lam chung mat bao nhieu gio?
Bai2
tinh tong cac phan so lon hon -1/14 va nho hon -1/15 va co tu la -4.
Bai3:Tinh tong
-24/72 + -20/48
5/4 + -1/2 + -7/8
3+-7/9+5/6
-6/7+-4/5+(-4)
15/-60+-42/56