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Ai trả lời được thì mình cho 5 sao nha. Cho mình mã may mắn nữa nhé
Ta có: 6=2.3
8=23
=> BCNN(6;8)=23.3=24
=> BC(6;8)=B(24)={0;24;48;72;96;120;...}
Vì
Cho mình thêm nhé!
Vì BC(6;8) có 2 chữ số
Nên những số cần tìm là {24;48;72;96}
7,429 has 4 digits
it: 7, 4, 2, 9
264 has 3 digits
it: 2, 6, 4
Mistake correction
1. How many=> much rice does she need?
2. Can you to go to the maker=>market for me?
3. I need 500 gram beef=> grams of beef and a dozen of eggs
4. I am thisty. I' d like drink=> to drink some water
5. How many=> much is a glass of apples=> apple juice?
10. What=> How do you feel and how => what would you like?
\(a,n^2+3⋮n-1\)
\(\Rightarrow n\left(n-1\right)+3+n⋮n-1\)
\(\Rightarrow n+3⋮n-1\)
\(\Rightarrow n-1+4⋮n-1\)
\(\Rightarrow4⋮n-1\)
...........You make the table, If i make the table, it will spent my times
That is answer:6 intergers
\(b,A=4+2^2+2^3+...+2^{20}\)
Put \(B=2^2+2^3+...+2^{20}\)
\(\Rightarrow2B=2^3+2^4+...+2^{21}\)
\(\Rightarrow2B-B=\left(2^3+2^4+...+2^{21}\right)-\left(2^2+2^3+...+2^{20}\right)\)\(\Rightarrow B=2^{21}-4\)
`\(\Rightarrow A=2^{21}-4+4=2^{21}\)
c,Consider the range of values
Put B=2.4.6.8...48
Because of B=2.4.6...10....48
=> The last digit of B is 0
Put C=1.3.5...49
Because of C= 1.3.5...49
=> The last digit of C is 5
=> B-C will have the last digit is 5
=> A have the last digit ís 5
There are 49 numbers