Các câu hỏi tương tự
Tinh a) (100-12)(100-22)(100-32)...(100-192)
b) (125-13)(125-33)(125-33).....(125-493)
Tinh:
A= (10^3-1}^1.(10^3-2)^2.(10^3-3)^3.........(10^3-100)^100
tinh nhanh
a) A= 33(1-2/3)(1-2/5)...(1-2/99)
b) B=101+100+99+98+...+3+2+1/101-100+99-98+...+3-2+1
c) C=423134x846267-423133/423133x846267+423134
Tinh
A=1×2×3+2×3×4+3×4×5+...+98×99×100
B=1×3+2×4+3×5+4×6+...+49×51+48×50
tinh tong phan so A=1/3+1/3^2+1/3^3+...+1/3^100
A=99-(1/2 + 1/3+1/4+...+1/100) : (1/2+2/3+3/4+...+99/100)
tinh gia tri cua A.
Tinh A=1/3+1/3^2+...+1/3^100
tinh tong
a/ A=1+2+22+...+2100
b/B=3+32+33+...+3100
c/C=1+2+4+8+16+...+8192
d/D=4+42+43+...+4n
Bai1:Tinh tong
a) 1+(-2)+3+(-4)+...+19+(-20)
b)1-2+3-4+...+99-100
c)2-4+6-8+...+48-50
d)-1+3-5+7-...+97-99
e)1+2-3-4+...+97+98-99-100