S = 38/25 + 9/10-11/15+13/21+15/28+17/36-19/45 +...-199/4950
Những câu hỏi liên quan
Giúp mình với: Tính tổng S = 38/25+9/10-11/15+13/21-15/28+17/36-19/45+...-199/4950
Tính tổng : A=38/25 + 9/10 - 11/15 + 13/21 - 15/28 + 17/36 - ................+197/4851-199/4950
bỏ tạm 38/25 ra
=(9/10-11/15) +(13/21-15/28) +(197/4851-199/4950)
=1/6+1/12+1/20+...+1/49*50=2450
=3-2/2x3+4-3/3x4+5-4/4x5+....50-49/49x50
=1/2-1/3+1/3-...-1/50
1/2-1/50=12/25
=38/25+12/25=50/25
=2
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.
(x-2)^2=38/25+9/10-11/15+13/21-15/28+17/36-...+197/4851-199/4950
Tìm x, biết :
(x - 2)^2 = 38/25 + 9/10 - 11/15 + 13/21 - 15/28 + 17/36 - ..... + 197/4851 - 199/4950
Tìm x:
[x-2]2=38/25+9/10-11/15+13/21-15/28+17/36-...+197/4851-199/4950
Tính tổng:
\(S=\frac{38}{25}+\frac{9}{10}-\frac{11}{15}+\frac{13}{21}-\frac{15}{28}+\frac{17}{36}-...+\frac{197}{4851}-\frac{199}{4950}\)
38/25+9/10-11/15+13/21-15/28+17/36_............+197/4851-199/4950
38/25+9/10-11/15+13/21-15/28+17/36_............+197/4851-199/4950
