\(A=\left(8^{200}-8^{199}\right):8^{198}+\left(7^{25}.7^{20}\right):7^{43}\)
\(\Rightarrow A=8^{199}\left(8^1-1\right):8^{198}+7^{45}:7^{43}\)
\(\Rightarrow A=8.7+7^2=56+49=105\)
\(A=\left(8^{200}-8^{199}\right):8^{198}+\left(7^{25}.7^{20}\right):7^{43}\)
\(\Rightarrow A=8^{199}\left(8^1-1\right):8^{198}+7^{45}:7^{43}\)
\(\Rightarrow A=8.7+7^2=56+49=105\)
C=1-2-3-4+5-6-7-8+...+197-198-199-200
A=1+2-3-4+5+6-7-8+...+197+198-199-200
Tính :
1 + 2 - 3 - 4 + 5 + 6 -7 - 8 + ... + 197 + 198 - 199 - 200
2/3*x-(1/2-3/4+5/6-7/8+...+197/198-199/200)=1/51+1/52+1/53+...+1/99+1/100
Tìm x
A= 1+2-3-4+5+-7-8+9+10-11-12+.........+197+198-199-200
TÍNH A
cho biểu thức
A=11+2-3-4+5+6-7-8+9-10-11-12+...+197+198-199-200
Tìm x
a) (x+3)/200 + (x+4)/199 + (x+5)/198= -3
b) (x+4)/2000+ (x+6)/999+(x+8)/499+7=0
c) |x-4| - |2x-1|=6
Cho B=1+2-3-4+5+6-7-8+...+197+198-199-200. Hỏi B chia hết cho số nào trong các số 2,3,4,5,9.
Cho M=1/51+1/52+.....+1/100 và N=1/2-3/4+5/6-7/8+.....+197/198-199/200.
Hãy tính M:N