Ta có :
\(\frac{A}{B}=\frac{\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+......+\frac{1}{100^2}}{\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+......\frac{1}{200^2}}=\frac{4\left(\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\right)}{\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}}=4\)
Vậy \(\frac{A}{B}=4\)
Cho A= \(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\) và B =\(\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\). Khi đó \(\frac{A}{B}\)= ?
Cho A=\(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\) và B=\(\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\). Khi đó \(\frac{A}{B}\)=
cho \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\)
và \(B=\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\)
Khi đó \(\frac{A}{B}=?\)
So sánh A ;B : \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2};B=\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\)
Cho A = \(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\)và B = \(\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\)
Khi đó \(\frac{A}{B}=......\)
ai biết giúp với hứa trả công 3 like. Mik cần gấp lắm!
Cho \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+....+\frac{1}{100^2}\)và \(B=\frac{1}{4^2}+\frac{1}{6^2}+........+\frac{1}{200^2}\)
Khi đó \(\frac{A}{B}=.....\)
So sánh \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2};B=\frac{1}{4^2}+\frac{1}{6^2}+...\frac{1}{200^2^{ }}\)
Cho \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\)và \(B=\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\). Vậy \(\frac{A}{B}\)=...
Bài 1: Cho: \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}\) và \(B=\frac{1}{4^2}+\frac{1}{6^2}+\frac{1}{8^2}+...+\frac{1}{200^2}\) Tìm \(\frac{A}{B}\)
Bài 2: Tính: \(M=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+\frac{1}{5^2}+...+\frac{1}{2014^2}\)
Bài 3: Tìm x;y biết: \(A=\left(x-y\right)^2+\left(2x+3y-10\right)^2-2\)
