Các câu hỏi tương tự
Tính tổng : A=38/25 + 9/10 - 11/15 + 13/21 - 15/28 + 17/36 - ................+197/4851-199/4950
\(tính\)\(nhanh\)\(:\)
\(\frac{38}{25}+\frac{9}{10}-\frac{11}{15}+\frac{13}{21}-...+\frac{197}{4851}-\frac{199}{4950}\)
Tính tổng : A=38/25 + 9/10 - 11/15 + 13/21 - 15/28 + 17/36 - ................+197/4851-199/4950
7 tháng 5 2022 lúc 14:55
A = \(\dfrac{28}{25}\) + \(\dfrac{9}{10}\) - \(\dfrac{11}{15}\) + \(\dfrac{13}{21}\) - \(\dfrac{15}{28}\) + \(\dfrac{17}{26}\) - ... + \(\dfrac{197}{4851}\) - \(\dfrac{199}{4950}\)
d/ khó lắm đó nha. ai biết minh tích
38/25 + 9/10 - 11/15 + 13/21 - 15/28 + 17/36 - ............. + 197/4851 - 199/4950.
2. ( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ......... + ( x + 28 ) = 155
S = 38/25 + 9/10-11/15+13/21+15/28+17/36-19/45 +...-199/4950
G=1/2.6+1/4.9+1/6.12+.................+1/36.57+1/38.60
H=38/25+9/10-11/15+13/21-15/28+17/36-19/45+....................+197/485-199/4950
Ai giúp mình nhanh nhất mình tick cho.
Tính nhanh:
A = \(\frac{\frac{2}{13}+\frac{2}{15}-\frac{2}{11}}{\frac{68}{34}+\frac{68}{30}-\frac{68}{22}}+\frac{\frac{32}{10}+\frac{32}{14}-\frac{32}{18}}{\frac{17}{5}+\frac{17}{7}-\frac{17}{9}}\)
\(\frac{2}{3}+\frac{6}{5}+\frac{9}{10}+\frac{14}{15}+\frac{20}{21}+\frac{27}{28}+\frac{35}{36}+\frac{44}{45}+\frac{44}{55}\)