Tính B=\(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}+\frac{1}{2916}+\frac{1}{8748}\)
Tính \(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\)
Tính
\(A=\frac{1}{2}+\frac{1}{2^2}+...+\frac{1}{2^9}\)
\(B=\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\)
tính
A=\(\frac{1}{2}+\frac{1}{2^2}+...+\frac{1}{2^9}\)
B=\(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\)
A=\(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\)
a) \(A=\frac{1}{2}+\frac{1}{2^2}+...+\frac{1}{2^9}\)
b)\(B=\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\)
Tim a,b biet\(a+b=3\left(a-b\right)=2\frac{a}{b}\)
B=\(\frac{1}{1.4}\)+ \(\frac{1}{12}\)+\(\frac{1}{36}\)+\(\frac{1}{108}\)+\(\frac{1}{324}\)+\(\frac{1}{972}\)
ai nhanh tick
Tính:
B = \(\frac{\frac{1}{9}-\frac{5}{6}-4}{\frac{7}{12}-\frac{1}{36}-10}\)
Nhanh lên, gấp lắm
Tính:
\(B=\frac{\frac{1}{9}-\frac{5}{6}-4}{\frac{7}{12}-\frac{1}{36}-10}\)