100000000+N=?
tìm hộ cái :)
100000000 con gà có bao nhiêu cái lông
Vậy 100000000 cái lông ở trên cơ thể của báo nhiêu con gà
một cái bánh bao cần 100000000 phút vậy 40 mươi cái bánh bao cần mấy phút
100000000 phút
cần 4000000000 phút
100000000+100000000-100000000*100000000:100000000
Tìm UCLN của N bình phương (n 2n 3n 1)của n thuộc N
Giúp hộ cái nha
100000000+100000000=?
100 000 000+ 100 000 000= 200 000 000
Tìm số nguyên n biết
n+7 chia hết cho n+2
Làm hộ mình cái
\(n+7⋮n+2\)
\(\Rightarrow\left(n+7\right)-\left(n+2\right)⋮n+2\)
\(\Rightarrow5⋮n+2\)
\(\Rightarrow n+2\inƯ\left(5\right)=\left\{\pm1;\pm5\right\}\)
ta có bảng :
n+2 | 1 | -1 | 5 | -5 |
n | -1 | -3 | 3 | -7 |
Vậy \(x\in\left\{-1;-3;3;-7\right\}\)
Có n+7 chia hết cho n+2
=>n+2+5 chia hết cho n+2
=> 5 chia hết cho n+2
=>n+2 thuộc Ư(5)={1;5;-1;-5}
Với n+2=1 =>n=(-1)
Với n+2=5 =>n=3
Với n+2=(-1) =>n=(-3)
Với n+2=(-5) =>n=(-7)
- Ta có: \(n+7=\left(n+2\right)+5\)
- Để \(n+7⋮n+2\)\(\Rightarrow\)\(\left(n+2\right)+5⋮n+2\)mà \(n+2⋮n+2\)
\(\Rightarrow\)\(5⋮n+2\)\(\Rightarrow\)\(n+2\inƯ\left(5\right)\in\left\{\pm1;\pm5\right\}\)
- Ta có bảng giá trị
\(n+2\) | \(-1\) | \(1\) | \(-5\) | \(5\) |
\(n\) | \(-3\) | \(-1\) | \(-7\) | \(3\) |
\(\left(TM\right)\) | \(\left(TM\right)\) | \(\left(TM\right)\) | \(\left(TM\right)\) |
Vậy \(n\in\left\{-7,-3,-1,3\right\}\)
100000000+200000000+....+100000000+2000000000
= 6000000000000000000000000000000000
400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
1+1+2+2+3+3..........................................................................................................+100000000+100000000=?
Câu này con thấy đc
1+1+2+2+3+3+....+100000000+100000000=2(1+2+3+...+100000000)=2x100000000x100000001:2=100000000x100000001
1+1+2+2+3+3+...........+100000000+100000000=1+1+2+2+3+3+.........100000000+10000000.có đúng ko