01892828388382828398:1999198181818828299

cac cau lam bai tap lich su chua lop 6 bai 5 neu lam roi chỉ cho minh lam voi nha cam on truoc ​

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ket ban voi minh di minh het luot roi sorry thong cam nha ket ban di ma con gai thoi nha con trai mien to thua roi nhan tin do lam

Tim so nguyên to p biet p+1 cung la so nguyên to

Giúp minh voi nhe,mai minh phai nop bai tap tet roi,gap lam

Hay lap tat ca cac so co 4 chu so trong do co hai chu so 3 mot chu so 2 va mot chu so 1 

ai lam duoc ma khong can gau minh cho 3 tick

cac ban lam bai nay de kiem tra kien thuc cua ban nha, minh da co ket qua va se theo doi ban nao tra loi dung va chi tiet nhat:

Moi tap hop sau co bao nhieu phan tu va neu ten ki hieu dau cham(.) trong cau c va d !

a) Tap hop A cac so tu nhien x ma x - 8= 12

b) Tap hop B cac so tu nhien x ma x + 7 = 7

c) Tap hop C cac so tu nhien x ma x . 0 = 0

d) Tap hop D cac so tu nhien x ma x .0 = 3

chung minh: (8n+1) x (6n+5) khong chia het cho 2

mih lam roi nhung hoi lai cac ban cho chac chan 

bai 1 

cho tong : S = 5 + 8 + 11 +14 = ....

a) tim so hang thu 100 cua tong

b) tinh tong 100 so hang dau tien

bai 2

cho tong : S = 7 + 12 + 17 + 22 + .......

a) tim so hang thu 50 cua tong

b) tinh tong 50 so hang dau tien

bai 3 

tinh tong cua tat ca cac so hang tu  nhien x , biet x la so tu nhien co 2 chu so va 12 < x <91

ban nao lam ho minh 3 bai tren voi ma ban nao nao lam ra dau tien minh se tich ngay va lun

\(y=\frac{1}{1.2.3}+\frac{1}{2.3.4}+\frac{1}{3.4.5}+.........+\frac{1}{10.11.12}\)

Lam giup minh voi nhanh len minh sap nop roi!!!!!!!!!!!!!!!!
 

Hai nguoi cung lam mot cong viec. Neu lam rieng nguoi thu nhat phai mat bon gio nguoi thu hai phai mat ba gio . hoi neu lam ching thi moi gio ca hai  nguoi lam may phan cong viec 

Cac bn nao biet nho tra loi nha minh ra ket qua roi do