a) \(3^4.\left(-4\right)^2=3^4.4^2=3^4.2^4=\left(3.2\right)^4=6^4\)

b) \(=1\frac{3}{5}+\left(6+\frac{5}{11}-4-\frac{5}{11}\right).\frac{1}{5}=1+\frac{3}{5}+2.\frac{1}{5}=2\)

c)\(=4.\left(0,75-0,25\right)=4.0,5=2\)

d) \(=\frac{\frac{1}{3}+\frac{3}{4}+\frac{3}{2}}{\frac{1.4}{3.4}+\frac{3.3}{4.3}+\frac{3.6}{2.6}}=\frac{\frac{1}{3}+\frac{3}{4}+\frac{3}{2}}{\frac{1}{3}+\frac{3}{4}+\frac{3}{2}}=1\)

\(\left(x-2\right)^6=\left(x-2\right)^8\)

\(\Rightarrow\left(x-2\right)^6-\left(x-2\right)^8=0\)

\(\Rightarrow\left(x-2\right)^6.\left[1-\left(x-2\right)^2\right]=0\)

\(\Rightarrow\left(x-2\right)^6=0\)hoặc \(\left[1-\left(x-2\right)^2\right]=0\)

+) \(\left(x-2\right)^6=0\Rightarrow x-2=0\)\(\Rightarrow x=2\)

+) \(\left[1-\left(x-2\right)^2\right]=0\Rightarrow\left(x-2\right)^2=1\)

\(\orbr{\begin{cases}x-2=1\Rightarrow x=3\\x-2=-1\Rightarrow x=1\end{cases}}\)

Vậy x=3 hoặc x= 1

sai đề ban ơi

đề như thế này

    \(\left(x-2\right)^6=\left(x-2\right)^8\)

đúng đề k cho minh nha

\(a)\left(-3\frac{3}{4}\right).1\frac{1}{2}\)

\(=\left(\frac{-15}{4}\right).\frac{3}{2}\)

\(=\frac{-45}{8}\)

\(b)5\frac{7}{10}.15\)

\(=\frac{57}{10}.15\)

\(=\frac{171}{2}\)

\(c)3\frac{3}{4}:1\frac{1}{5}\)

\(=\frac{15}{4}:\frac{6}{5}\)

\(=\frac{25}{8}\)

\(d)4\frac{2}{5}:2\)

\(=\frac{22}{5}:2\)

\(=\frac{11}{5}\)

~Học tốt~

Câu hỏi của Phạm_Tiến_Đức - Toán lớp 6 - Học toán với OnlineMath

https://olm.vn/hoi-dap/detail/81346038854.html

Ta có: \(\left|x-2\right|\ge0;\left|-2y+8\right|\ge0\)

=> \(P=\left|x-2\right|+\left|-2y+8\right|+2018\ge0+0+2018=2018\)

"=" xảy ra khi và chỉ khi x-2=0 và -2y+8=0 <=> x=2 và y=4

Kết luận: min P=2018 tại x=2, y=4

A/B=-5/4

Học tốt nhé! 

thi học kì làm điểm cao nha!

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???

\(\frac{-3}{5}+x\div\frac{5}{6}=1\frac{1}{2}\)

\(\Leftrightarrow\frac{-3}{5}+\frac{5}{6}x=\frac{3}{2}\)

\(\Leftrightarrow\frac{5}{6}x=\frac{3}{2}+\frac{3}{5}\)

\(\Leftrightarrow\frac{5}{6}x=\frac{15}{10}+\frac{6}{10}\)

\(\Leftrightarrow\frac{5}{6}x=\frac{21}{10}\)

\(\Leftrightarrow x=\frac{21}{10}\div\frac{5}{6}\)

\(\Leftrightarrow x=\frac{21}{10}\times\frac{6}{5}\)

\(\Leftrightarrow x=\frac{21}{5}\times\frac{3}{5}\)

\(\Leftrightarrow x=\frac{63}{25}\)

\(\frac{-3}{5}+x\div\frac{5}{6}=1\frac{1}{2}\)

\(\Leftrightarrow-\frac{3}{5}+x.\frac{6}{5}=\frac{3}{2}\)

\(\Leftrightarrow\frac{6x}{5}=\frac{3}{2}+\frac{3}{5}\)

\(\Leftrightarrow\frac{6x}{5}=\frac{21}{10}\)

\(\Leftrightarrow60x=105\Leftrightarrow x=\frac{7}{4}\)