A = 3^100 - 3^99 + 3^98 - 3^97 +...........+ 3^2 - 3 + 1
3A = 3^101 - 3^100 + 3^99 - 3^98 +...+3^3 -3^2 +3
=> 4A = 3A + A = 3^101 + 1
A = 3101 + 1
4
Rút gọn biểu thức
b) B=2^100-2^99+2^98-2^97+...+2^2-2
c) C=3^100-3^99+3^98-3^97+...+3^2-3+1
Bài 1 :Rút gọn A=2^100-2^99+2^97+...+2^2 -2
B=3^100-3^99+3^98-3^97+...+3^@ +1
bài 2:
Cho C =1/3+1/3^2+1/3^3+...=1/3^99
CMR C<1/2
Rút gọn B=2^100-2^99+2^98-2^97+...+2^2-2 ; C= 1+(-3)+(-3)^2+...+(-3)^100
1.Rút gọn:
\(A=2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-2\)
\(B=3^{100}-3^{99}+3^{98}-3^{97}+...+3^2-3\)
Rút gọn :
\(A=2^{100}-2^{99}+2^{98}-2^{97}.............+2^2-2\)
\(B=3^{100}-3^{99}+3^{98}-3^{97}.........+3^2-3+1\)
Rút gọn:
a/ A=2^100-2^99+2^98-2^97+............+2^2-2
b/ B=3^100-3^99+3^98-3^97+..............+3^2-3+1
Ai nhanh nhất là đúng nhất mk tick cho
Rút gọn:
a) \(A=2^{100}-2^{99}+2^{98}-2^{97}+...+2^2-2\)
b) \(B=3^{100}-3^{99}+3^{98}-3^{97}+...+3^2-3+1\)
Rút gọn
A=2100-299+298-297+.....+22-2
B=3100-399+398-397+....+32-3+1
Rút gọn
A=2100-299+298-297+...+22-2
B=3100-399+398-397+...+32-3+1
