B= -3/4 + 3/ 4^2 - 3/ 4^3 + 3/4 ^4 - ... + 3/4^100
RÚT GỌN
B = 3 + 3^2 + 3^3 + 3^4 + ... + 3^50
C = 4 + 4^2 + 4^3 + 4^4 + ...+ 4^2018
Thu gọn
B= -3/4 + 3/ 4^2 - 3/ 4^3 + 3/4 ^4 - ... + 3/4^100
Rút gọn
A= -4/5+4/5^2-4/5^3+4/5^4-...-4/5^101
B=1/3+2/3^2+2^2/3^3+2^3/3^4+2^4/3^5+...+2^98/3^99+2^99/3^100
A=4+4²+4³+...+4¹⁹+4²⁰
B=1+3+3²+3³+...3⁹⁹
haỹ tính những giá trị sau
A=3^2+3^3+3^4+...+3^100
B=4^200-4^198+4^196-...-4^4+4^2-4
C=5^50-5^48+5^46-...-5^4+5^2-5
D=3^99-3^96+3^93-...+3^3-3^1
E=5^99-5^96+5^93-...+3^3-3^1
F=3^50-3^48+3^46-...-3^4+3^2-3
a)16/9+3/5
b)4/13--12/7
c)-3/2+4/5
d)3/-4-1/4
e)-1/5.5/7
f)7/8.64/49
g)3/4:15/24
h)5/6:(4/3+3/4)
i)1/2-(1/3+2/3)
k)4/9+1/2.2/3
l)1/2+3/4-(3/4-4/5)
giải nhanh giúp mik vs nha do mình đang cần gấp
Thu gọn
B= -3/4 + 3/ 4^2 - 3/ 4^3 + 3/4 ^4 - ... + 3/100
4/3-4/3^2-4/3^3-...-4/3^100 = ?
Tính
a. 3 + 3^3 + 3^5 + 3^7 +......+ 3^51 + 3^53
b. 1 + 4^2 + 4^4 +......+ 4^2020 + 4^2022
c. Bik : 1^3 + 2^3 + 3^3 +...+ 9^3 = 2025
Hãy tính E = 2^3 + 4^3 + 6^3 +...+ 18^3
