\(1+4+9+16+...+100\)
\(=1^2+2^2+3^2+4^2+...+10^2\)
\(=\frac{10.\left(10+1\right).\left(10.2+1\right)}{6}=385\)
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\(1+4+9+16+...+100\)
\(=1^2+2^2+3^2+4^2+...+10^2\)
\(=\frac{10.\left(10+1\right).\left(10.2+1\right)}{6}=385\)
1+4+9+16+....+100
tong ket qua tren la
cho day so : 1 , 4 , 9 , 16 , ... , 100
day so tren co ket qua la ..........................................
tinh tong 1+5+9+13+..............biet tong tren co 100 so hang
Tinh tong 1+5+9+13+........ Biet tong tren co 100 so hang
hoa tinh tong tat ca cac so chan tu 2 den 100. lan tinh tong tat ca cac so le tu 1 den 99. mai lay ket cua cua hoa tru di ket qua cua lan. hoi mai nhan duoc ket qua la bao nhieu.
1+4+9+16+...+100 co tong la
tinh tong sau : 1+ 4 + 9 + 16 + .. + 100
tinh tong sau:1+4+9+16+.........+100
tinh tong sau :1+4+9+16+.......+100