tinh C =-1/3(1+2+3)-.....-1/50(1+2+3+...+50)
Những câu hỏi liên quan
Tinh :
a) 1.2+2.3 + .... + 49 . 50
b) 1 mũ 2 + 2 mũ 2 + ....+ 50 mũ 2
c) 1 .2 .3 + 2 .3 .4 + ..... + 98 .99 .100
tinh 1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+...+1/(1+2+3+4+...+99)+1/50
sao bn ko tra trên mạng ấy
Tinh
A)1×3+2×5+3×7+4×9+...+50×101
b)1×5+2×7+3×9+4×11+...+50×103
tinh tong sau:-(1+3)/2 -(1+4)/2-...-(1+50)/2
tinh
1/1^2+1/2^2+1/3^2+......+1/50^2
tinh (1/2^2-1)(1/3^2-1)(1/4^2-1)....(1/50^2-1)
tinh tong s=1*100+2*99+3*98+..+49*51+50*50
Tinh : (1000-1^3)*(1000-2^3)*(1000-3^3)....(1000-50^3)
Tinh:(1000-1^3).(1000-2^3).(1000-3^3).....(1000-50^3)
Ta có:
\(A=\left(1000-1^3\right).\left(1000-2^3\right).........\left(1000-50^3\right)\)
\(A=\left(1000-1^3\right).\left(1000-2^3\right).......\left(1000-10^3\right)........\left(1000-50^3\right)\)
\(A=0.\left(1000-1^3\right).\left(1000-2^3\right)....\left(1000-9^3\right).\left(1000-11^3\right).....\left(1000-50^3\right)\)
A = 0
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