Vậy 100000000 cái lông ở trên cơ thể của báo nhiêu con gà

100000000 phút

cần 4000000000 phút

100000000                     .

100000000           

100000000 + 100000000 = 200000000

= 200 000 000

Tích mik nhé -^^-

\(n+7⋮n+2\)

\(\Rightarrow\left(n+7\right)-\left(n+2\right)⋮n+2\)

\(\Rightarrow5⋮n+2\)

\(\Rightarrow n+2\inƯ\left(5\right)=\left\{\pm1;\pm5\right\}\)

ta có bảng :

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)

= 6000000000000000000000000000000000

400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Câu này con thấy đc
1+1+2+2+3+3+....+100000000+100000000=2(1+2+3+...+100000000)=2x100000000x100000001:2=100000000x100000001

Ngu Người = Super crazy