a) (y+1/3)+(y+2/9)+(y+1/27)+(1/81)=56/81
b) (1/2+1/4+1/8+1/16):y=1/2+1/6+1/12+1/20+...+1/132
Tìm x biết (1/2+1/4+1/8+1/16):x=1/2+1/6+1/12+1/20+...+1/132
<1/2+1/4+1/8+1/16> x y =1/2+1/6+1/12+1/20+........+1/132
mình đang cần liền ai nhanh mình tick
Tìm x biết (1/2+1/4+1/8+1/16):x=1/2+1/6+1/12+1/20+...+1/132
(1/2+1/4+1/8+1/16):x=1/2+1/6+1/12+1/20+...+1/132
Tìm x;
(\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\)) : x = (\(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+.......+\frac{1}{132}\))
tìm x biết: \(\frac{\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)}{x}=\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{132}\)
Tìm x biết \(\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)\div x=\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{132}.\)
bài 1 tìm x; ( 1/15+ 1/35+ 1/63) * x=1
( 1/2+1/4+1/8+1/16) : x=1/2+1/6+1/12+1/20+........+1/132
(1- 1/2)* (1-1/3)* (1-1/4)*......*(1-1/x)=0,01