Question

Tìm x:

a) |x|-3/4=5/3

b) |2x-1/3|+5/6=1

c) 17/2-|2x-3/4|=-7/4

d) |2x-1|=(-4) mũ 2

Answer 1

d) khó nhất mk làm nhé : 
\(\left|2x-1\right|=\left(-4\right)^2\)

\(\left|2x-1\right|=16\)

\(\Leftrightarrow\orbr{\begin{cases}2x-1=16\\2x-1=-16\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}2x=17\\2x=-15\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=\frac{17}{2}\\x=-\frac{15}{2}\end{cases}}\)