1 phần 1. 2 + 1phan 2.3 + 1 phan 3.4+...............+ 1phan 98.99 +1phan 99.100
chung minh rang : 1 phan 2 mu 2 + 1 phan 2 mu 3 + 1 phan 2 mu 4 + .......+ 1phan 2 mu 11 < 1
Chung minh tong cua 1so nguyen voi 1phan so toi gian la phan so toi gian
so tu nhien xy thoa man x phan 5 - 4 phan y=1phan 3
3m 6dm =...dm
3kg 150g =.....g
400m2=......ha
0,6 gio =..... phut
2phan 5÷ 2phan 3 -1phan 6
1phan 2 +3 ×1phan 6
x+1 phan x-1
2x+3 phan x-2
2x-1phan x+3
2x+3 phan3x-1
7 phan 8 - (2x-1 phần 4) = 1phan ;giải giùm mình nha chi tiết luôn mình tick cho
1 phan 123 +1phan234+....+1phan n(n+1).(n+2)
Cho 2 tap hop
A={but,thuoc,tay}
B={cam,oi,nhan, mit,dua
Hay viet cac tap hop gom 1phan tu cua A va 3 phan tu cuaB