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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
-98.(1-247)+98-247.98
= 98 {(-1+247) +1-247}
= 98 (-1+1+247-247)
=98. (0+0)
=0
![](https://rs.olm.vn/images/avt/0.png?1311)
1:
#include <bits/stdc++.h>
using namespace std;
long long t,i,n;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++) t+=i;
cout<<t;
return 0;
}
Bài 2:
#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++)
if (i%2==0) t+=i;
cout<<t;
return 0;
}
Bài 3:
#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++)
if (i%2!=0) t+=i;
cout<<t;
return 0;
}
Bài 4:
#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++)
if (i%3==0) t+=i;
cout<<t;
return 0;
}
Bài 5:
#include <bits/stdc++.h>
using namespace std;
long long n,i,t;
int main()
{
cin>>n;
t=1;
for (i=1; i<=n; i++)
t*=i;
cout<<t;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 3:
a: Bậc là 7
b: Bậc là 5
c: Bậc là 2
d: Bậc là 4
e: Bậc là 2
f: Bậc là 9
g: bậc là 1
h: bậc là 0
![](https://rs.olm.vn/images/avt/0.png?1311)
1 He is told to take a long rest
2 This plant isn't watered everyday
3 Beer is drunk all over the world
4 Uniform is worn to school by students
5 Reports are sent to the manager by the secretary in the afternoon
6 How many languages are spoken in Canada?
Bài 2
1 I was brought this dish by the waiter
2 I wasn't showed the special cameras
3 Her ticket was showed to her friends
4 The broken cup was hidden in the drawer by Tom
5 The fridge wasmoved into the living room by his uncle
![](https://rs.olm.vn/images/avt/0.png?1311)