=( 9999999999 + 1 ) + ( 1 + 2 +3 )
= 10000000000 + 6
= 10000000006
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Tính: \(T=9^9+9^{99}+9^{999}+9^{9999}+9^{99999}+9^{999999}+........+9^{9999999999}+9^{9999999999}+9^{999999999999}+9^{999999999999}\)
Bài tập dãy số theo quy luật:
Bài 1: E= 1.3.5-3.5.7+5.7.9-7.9.11+....+49.51.53
D= 1.33 + 3.53 + 5.73 +.......+ 49.513
F= 1.992 +2 .982 + 3.972 +........+ 49.512
G= 9+99+999+.....+ 9999999999
Giải giúp hộ
aaaaaaa bbbbbb =1111111111111+22222222222+33333333333+9999999999=?
ddddddd bbbbb ggggggggg=?
1234231+678574+8695+(56565656+474747474)=?(giải giúp mình nha)
so sánh
a)A=1/2^1+1/2^2+1/2^3+...+1/2^49+1/2^50 với 1
b)B=1/3^1 +1/3^2+1/3^3...+1/3^99+1/3^100 với 1/2
c)C=1/4^1+1/4^2+1/4^3+...+1/4^999+1/4^1000 với 1/3
a,Cho B = 1/2+1/2^2+1/2^3+...+1/2^99. So sánh B với 1
b, Cho C = 1/3+(1/3)^2+(1/3)^2+(1/3)^3+...+(1/3)^99. CMR C < 1/2
a, 3-3/2.(2x-1)-1/2.(3x+2)=2x-3
b, 7/2+1/2.(4x-3/2)-1/3.(3-6x)=1/2.(x-1)
c, 3/2.(2x-1/2)-7/2.(3x+1/3)-1/2.(2x-1)=3x+5
a) cho B = 1/2 + 1/2^2 + 1/2^3 +....+1/2^99. só sánh B với 1
b) cho C = 1/3 +(1/3)^2 + (1/3)^2 + (1/3)^3 + ..... + (1/3)^99. CMR C<1/2
a,Cho B = 1/2+1/2^2+1/2^3+...+1/2^99. So sánh B với 1
b, Cho C = 1/3+(1/3)^2+(1/3)^2+(1/3)^3+...+(1/3)^99. CMR C < 1/2
Tính?
A = 3.\(\frac{1^3}{2}+6.\frac{1^2}{2}.\frac{-1^2}{3}+3.\frac{1}{2}.\frac{-1^3}{3}\)
B = \(3.\frac{1}{2}.\frac{-1}{3}\left(\frac{1^2}{2}+2.\frac{1}{2}.\frac{-1}{3}+\frac{-1^2}{3}\right)\)