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a x * 4 + [1/2 + 1/4 + 1/8 + 1/6] = 23/16
x * 4 + 25/24 = 23/16
x * 4 = 23/16 - 25/24
x * 4 = 38/96 = 19/48
x = 19/48 / 4
x = 19/172
b x * 1 = 425
x = 425 / 1
x = 425
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Nhưng Azure phan bảo linh ơi, mình cần cả bài giải cơ nếu bạn ghi hẳn bài giải ra thì mình sẽ k cho nhé
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Xx4+(1/2+1/4+1/8+1/16)=23/16
Xx4=23/16-(1/2+1/4+1/8+1/16)
Xx4=1/2
X=1/2:4
X=1/8
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\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
\(4x+\frac{15}{16}=\frac{23}{16}\)
\(4x=\frac{1}{2}\)
\(x=\frac{1}{8}\)
Vậy \(x=\frac{1}{8}\)
\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Rightarrow\left(x+x+x+x+x\right)+\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Rightarrow5x+\frac{15}{32}=\frac{23}{16}\)
\(\Rightarrow5x=\frac{23}{16}-\frac{15}{32}\)
\(\Rightarrow5x=\frac{31}{32}\)
\(\Rightarrow x=\frac{31}{32}.\frac{1}{5}=\frac{31}{160}\)
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câu này ở trong Violympic nên mình nói luôn đáp án là 1/8
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x+\frac{1}{2}+x+\frac{1}{4}+x+\frac{1}{8}+x+\frac{1}{16}=\frac{23}{16}=>4x=\frac{23}{16}-\frac{15}{16}=\frac{1}{2}=>x=\frac{1}{8}\)
(xx4)+1/2+1/4+1/8+1/16=23/16
xx4=23/16-(1/2+1/4+1/8+1/16)
xx4=1/2
x=1/2:4
x=1/8
Đúng 100% nhé Nhớ k cho mình đấy
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=>(x+x+x+x)+(1/2+1/4+1/8+1/16)=1
=>4x+15/16=1
=>4x=1-15/16=1/16
=>x=1/16:4
=>x=1/64
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4x + 15/16 =23/16
4x = 23/16 - 15/16
4x=1/2
x=1/2:4
x=1/8
x bằng 1/8 chuẩn luôn không sai tí nào mình thử rồi