=10000 

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=1024.9+1024-8.30

=1024.(9-8).30

=1024.30

=30720

t=1

x=2

mình lộn x=3 mới đúng 

• Volunteer. There is no avoiding a child's eyes looking up at you, an amputee holding out an empty McDonald's cup. ...
• Give A Moment. The simplest and the most valuable thing you can give to a child is time. ...
• Eat Together. Photo by carf. ...
• Share Your World. ...
• Play With Pictures. ...
• Feel the Music. ...
• Create a Picture. ...
• Teach Each Other.

That's a good thing that we all should do

1. He's got flowers .

They're his / him .

2. She's got an umbrella .

It's her / hers .

3. We've got short .

They are our / ours shorts .

4. I've got a guitar .

It's my / mine .

5They've got aTV

It's their / theirs .

Ta có :  x < y mà  \(x=\frac{a}{m}\)và   \(y=\frac{b}{m}\)

\(\Rightarrow a< b\)

a<b \(\Rightarrow a+a< b+a\)

\(\text{Hay}\)\(2a< b+a\)

\(\Rightarrow\frac{a+b}{2m}>\frac{2a}{2m}\)

\(\Rightarrow z>x\)( 1)

a < b \(\Rightarrow a+b< b+b\)

Hay \(a+b< 2b\)

\(\Rightarrow\frac{a+b}{2m}< \frac{2b}{2m}\)

\(\Rightarrow z< y\)(2)

Từ (1) và (2) suy ra : x < z < y (đpcm)

\(x< y\Rightarrow\frac{a}{m}< \frac{b}{m}\Rightarrow a< b\)

\(\Rightarrow\frac{a}{2m}+\frac{a}{2m}< \frac{a}{2m}+\frac{b}{2m}< \frac{b}{2m}+\frac{b}{2m}\)

\(\Rightarrow\frac{2a}{2m}< \frac{a+b}{2m}< \frac{2b}{2m}\)

\(\Rightarrow\frac{a}{m}< \frac{a+b}{2m}< \frac{b}{m}\)

\(\Rightarrow x< z< y\)

=19/18 nha bn

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=19/18 nha bn

học tốt