Các câu hỏi tương tự
ban na lam mot bai thi gom 20 cau trac nghiem.Moi cau tra loi dung duoc 5 diem,sai tru 2 diem,bo qua thi 0 diem.Cham 7 cau trong bai thi co cau Na tra loi sai.Tinh so cau tra loi dung,so cau sai,so cau bo qua,neu Na duoc:
a)60 diem
b)55 diem
GIUP MINH VOI!HELP ME!!
de chuan bi cho ki thi hoc sinh gioi mot hoc sinh duoc 35 bai toan . Biet rang cu moi bai dat loai gioi duoc thuong 20 diem , moi bai dat loai kha, trung binh duoc thuong 5 diem . Con moi bai loai yeu , kem bi tru 10 diem . Lam xong 35 bai em do duoc thuong 130 diem . hoi co bao nhieu bai loai gioi va co bao nhieu bai yeu , kem . biet co 8 bai kha va trung binh
Xem chi tiết
Cau1.Hay tinh hop li cac tong sau daya) A1/3+1/3^2+1/3^3+....+1/3^100b)B10/56+10/140+10/260+....+10/1400Cau2Cho C2+2^2+2+3+...+2^99+2^100a)Tinh tong Cb)Tim x de2^2x-1-2C c)Chung minh rang C chia het ch 31Cau 3a) So sanh: A2005^2005+1/2005^2006+1 va B2005^2004+1/2005^2005+1b)Tim so nguyen m sao cho so m+6/m-1 la so nguyenCau4Cho ABx(cm) AC7(cm) BC2x-1(cm) .Timx sao cho ba diem A B C thang hangCau 5a) Tim x,y thuoc N biet 2^x+6245^yb)Voi gia tri nao cua x ,y thi bieu thuc A/x-y/+/x+1/+2013...
Đọc tiếp
Cau1.Hay tinh hop li cac tong sau day
a) A=1/3+1/3^2+1/3^3+....+1/3^100
b)B=10/56+10/140+10/260+....+10/1400
Cau2
Cho C=2+2^2+2+3+...+2^99+2^100
a)Tinh tong C
b)Tim x de2^2x-1-2=C
c)Chung minh rang C chia het ch 31
Cau 3
a) So sanh: A=2005^2005+1/2005^2006+1 va B=2005^2004+1/2005^2005+1
b)Tim so nguyen m sao cho so m+6/m-1 la so nguyen
Cau4
Cho AB=x(cm) AC=7(cm) BC=2x-1(cm) .Timx sao cho ba diem A B C thang hang
Cau 5
a) Tim x,y thuoc N biet 2^x+624=5^y
b)Voi gia tri nao cua x ,y thi bieu thuc A=/x-y/+/x+1/+2013 dat gia tri nho nhat .Tim gia tri nho nhat do
Chu y dau ''/'' la dau gia tri tuyet doi
Cau 6
De chuan bi cho ki thi hoc sinh gioi, mot hoc sinh giai 35 bai toan.Biet rang cu moi bai dat loai gioi duoc thuong 20 diem moi bai dat loai kha trung binh duoc thuong 5 diem . Con moi bai yeu, kem bi tru 10. Lam xong 35 bai em do duoc thuong 130 diem .Hoi co bao nhieu bai loai gioi ,bao nhieu bai loaiyeu ,kem .Biet rang co8 bai kha va trung binh
Ai lam dung minh tich cho
Nho giai ra nha
1 cuoc thi co 30 cau hoi.moi cau tra loi dung duoc 10 diem,moi cau tra loi sai tru 3diem.1 ban hoc sinh duoc 131 diem .hoi ban tra loi may cau dung ,may cau sai?
Rut gon cac bieu thuc sau:
a, (x+3)(x-4)-(x-1)(x+2)
b, a3+b3+3.a2.b+3ab2
Ai lam nhanh nhat va day du nhat thi to se tick cho
(Nho lam day du moi tick nhe,ko can lam het ca 2 cau ,biet lam cau nao thi lam cau do)
Trong mot cuoc thi tra loi cau hoi. Mot doi phai tra loi 12 cau hoi moi cau dung thi duoc 5 diem , moi cau sai bi tru 3 diem, khong tra loi thi khong co diem nao.Tong so diem doi do dat duoc la 11 diem .Hoi doi do tra loi dung may cau ? Sai may cau.................ai biet thi tra loi nhanh ho minh voi nha................. khan cap, khan cao
CAC BAN CO BIET NHUNG CAU HOI NAO THUONG CO TRONG BAI KIEM TRA HOC KI 2 KO
NEU BAN NAO KIEM TRA HOC KI ROI NHO TRA LOI MK NHA
MAI MK THI ROI NEN MK DANG CAN GAP
AI TRA LOI NHANH MK SE TICK CHO
LOP 6 NHA MOI NGUOI
cau 2:trong 1 phep chia neu ta gap doi so chi thi thuong cua phep chia cu gap ....... lan so voi phep chia cua moi
cau 3:1 lop hoc co hs chia thanh cac nhom moi nhom nhieu nhat 6 hshoi so nhom it nhat co the la .................
cau 4 : khi chia so a cho 8 duoc thuong la 125 so du la so du lon nhat co the
huong dan giai bai toan tinh so bat tay la bai trong hoi thi the thao 8 doi bong chuyen tham gia moi doi co 7 cau thu hoi ho cung bat tay nhau moi nguoi mot cai thi tat ca ca co bao nhieu cai bat tay ? cau thu trong cung trong doi khong bat tay nhau moi nguoi trong doi bat tay voi moi nguoi trong doi khac thi co tat ca bao nhieu cai bat tay