Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
ve :10 cay 9 hang . moi hang 3 cay
ve:10 cay 9 hang moi hang 3 cay (dung co like)
co 9 cay 10 hang moi hang 3 cay hay ve giup di
theo hinh 14 thi ta co the trong duoc 12 cay thanh 6hang moi hang 4 cay . hay ve so do trong 10 cay thanh 5hang moi hang 4cay
day la toan lop 6 hinh hoc tap 1 tang 107
ve so do trong 10 cay thanh 5 hang moi hang 4 cay
Co 6 cay sap thanh 5 hang moi hang 3 cay vay mik phai ve the nao
cho 9 cay trong thanh 9 hang moi hang 3 cay
Hay trong 9 cay thanh 9 hang moi hang co 3 cay
bai 1. 11/3.40/13+37/5:7/33-(11/13.1/3+33/7:5/2)
bai 2.tim x
a,3.(x-1)-5.(-7)=(-2)^3-2x
b,2./(1-x)^2+1/-2^2.3=8
bai 3,cho bieu thuc
M=n+1/n+1 - 3-8n/n+1 + 8/n+1
tim cac gia tri cua n de bieu thuc M co gia tri nguyen
bai 4,So hoc sinh cua 1 truong ko qua 1000 em,neuxeptoan bo so hoc sinh cua truong do thanh cac hang,moi hang 20 nguoi thi con thieu 5 nguoi,neu xep moi hang 25 nguoi hoac 30 nguoi thi deu thua 15 nguoi , neu xep 42 hang thi vua du . hoi truong do co bao nhieu hoc sinh
bai 5,cho bieu thuc
A=2+2^2+...+2^200
c/m rang
a, A+2 la 1 luy thua cua 2
b, Achia het cho 30
c,A co phai la so chinh phuong ko ? vi sao ?
bai 6,cho 2 bieu thuc
A=1/1+2 + 1/1+2+3 + ...1/1+2+3+...+99
B=1 + 1/2^2+1/3^2 + ...+1/29^2
c/m rang A<B
ai co the giup bai nao thi noi luon cach giai nhe
le len may bn
