Các câu hỏi tương tự
1/2 + 2/3 + 3/4 + 4/5 + 5/6 + 6/7 + 7/8 + 8/9 + ........+ 95/96 + 96/97 + 97/98 + 98/99 + 99/100 = ?
tính biểu thức :
S= 2*4+4*6+6*8+...+98*100
\frac{2}{2\cdot 4}+\frac{2}{4\cdot 6}+\frac{2}{6\cdot 8}+...+\frac{2}{98\cdot 100}
x + ( x + 2 ) + ( x + 4 ) + ( x + 6 ) + ( x + 8 ) +...........+ ( x + 98 ) + ( x + 100 ) = 2601
1-2-3-4+5-6-7-8+9-10-11-12+...................+97-98-99-100
1-2+3+4+5-6-7×8+9-10-11+12+...+97-98-99+100
\(S= 1+2-3-4+5+6-7-8+...+97+98-99-100\)
1/7^2 - 1/7^4+1/7^6 - 1/7^8+...+1/7^98 - 1/7^100 = ?
tính: 2*4+4*6+6*8+..........+98*100+100*102
giúp mk vs
mk đg cần gấp