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\(S=\frac{3}{2}+\frac{5}{4}+\frac{9}{8}+\frac{17}{16}+\frac{33}{32}+\frac{65}{64}-7\)
\(S=\left(1+\frac{1}{2}\right)+\left(1+\frac{1}{4}\right)+\left(1+\frac{1}{8}\right)+\left(1+\frac{1}{16}\right)+\left(1+\frac{1}{32}\right)+\left(1+\frac{1}{64}\right)-7\)
\(S=\left(1+1+....+1\right)+\left(\frac{1}{2}+\frac{1}{4}+...+\frac{1}{64}\right)-7\)
\(S=6+\left[\left(1-\frac{1}{2}\right)+\left(\frac{1}{2}-\frac{1}{4}\right)+....+\left(\frac{1}{32}-\frac{1}{64}\right)\right]-7\)
\(S=6+\left(1-\frac{1}{64}\right)-7\)
\(S=6+\frac{63}{64}-7\)
\(S=\frac{447}{64}-7=-\frac{1}{64}\)
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\(S=\frac{3}{2}+\frac{5}{4}+\frac{9}{8}+\frac{17}{16}+\frac{33}{32}+\frac{65}{64}-7\)
\(S=1+\frac{1}{2}+1+\frac{1}{4}+1+\frac{1}{8}+1+\frac{1}{16}+1+\frac{1}{32}+1+\frac{1}{64}-7\)
\(S=\frac{1}{2^1}+\frac{1}{2^2}+\frac{1}{2^3}+\frac{1}{2^4}+\frac{1}{2^5}+\frac{1}{2^6}-1\)
\(S+1=\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+\frac{1}{2^4}+\frac{1}{2^5}+\frac{1}{2^6}\)
\(2\left(S+1\right)=1+\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+\frac{1}{2^4}+\frac{1}{2^5}\)
\(2\left(S+1\right)-\left(S+1\right)=S+1=1-\frac{1}{2^6}=\frac{63}{64}\)
\(S=\frac{63}{64}-1\)
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\(\sqrt{64}+3.\sqrt{\left(\frac{1}{2}\right)^0}-\frac{\sqrt{16}}{4}+\left(\sqrt{\left(-4\right)^2:\frac{1}{2}}\right).8\)
= \(8+3.1-\frac{4}{4}+\left(\sqrt{16:\frac{1}{2}}\right).8\)
=\(8+3-1+\left(\sqrt{16.2}\right).8\)
=\(8+3-1+\left(\sqrt{32}\right).8\)
=\(11-1+\left(\sqrt{32}\right).8\)
= \(10+5,65685424949.8\)
= \(10+45,2548339959\)
=\(55,2548339959\)
Mình ko biết là có đúng không í
vì mình thấy đề bài có gì sai ý!!!
\(\sqrt{64}+3\sqrt{\left(\frac{1}{2}\right)^0}-\frac{\sqrt{16}}{4}+\left(\sqrt{\left(-4\right)^2}:\frac{1}{2}\right).8\)
\(=\sqrt{8^2}+3\sqrt{1}-\frac{\sqrt{4^2}}{4}+\left(\sqrt{16}:\frac{1}{2}\right).8\)
\(=8+3-\frac{4}{4}+\left(\sqrt{4^2}:\frac{1}{2}\right).8\)
\(=11-1+\left(4.2\right).8\)
\(=10+8.8=10+64=74\)
lớp 7 đấy à