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b) \(2^x=32^5\cdot64^6\)
\(2^x=32^5\cdot\left(2\cdot32\right)^6\)
\(2^x=32^5\cdot2^6\cdot32^6\)
\(2^x=32^{11}\cdot2^6\)
\(2^x=32^{11}\cdot32\cdot2\)
\(2^x=32^{12}\cdot2\)
\(2^x=\left(2^5\right)^{12}\)
\(2^x=2^{60}\)
\(=>x=60\)
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a: \(-\dfrac{2}{5}+\dfrac{4}{5}x=\dfrac{3}{5}\)
=>\(\dfrac{4}{5}x=\dfrac{3}{5}+\dfrac{2}{5}=1\)
=>\(x=1:\dfrac{4}{5}=\dfrac{5}{4}\)
b; \(-\dfrac{3}{7}-\dfrac{4}{7}:x=-2\)
=>\(\dfrac{4}{7}:x+\dfrac{3}{7}=2\)
=>\(\dfrac{4}{7}:x=2-\dfrac{3}{7}=\dfrac{11}{7}\)
=>\(x=\dfrac{4}{7}:\dfrac{11}{7}=\dfrac{4}{11}\)
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Mình chỉ biết làm câu b thôi. Xl nhé!
b/ \(2^x=32^5.64^6\)
\(\Rightarrow2^x=\left(2^5\right)^5.\left(2^6\right)^6\)
\(\Rightarrow2^x=2^{25}.2^{36}\)
\(\Rightarrow2^x=2^{25+36}\)
\(\Rightarrow2^x=2^{61}\)
\(\Rightarrow x=61\)
Vậy \(x=61\)
35 EM EHHH
5.7=35
vì 5.7=5+5+5+5+5+5+5(7 lần số 5)=35