giúp mình nha (. là nhân nhé)
1.thực hiện phép tính
a)(-\(\dfrac{2}{3}\)).\(\dfrac{3}{11}\)-(\(\dfrac{4}{3}\))\(^2\).\(\dfrac{3}{11}\)
b)(-1\(\dfrac{3}{4}\))\(^2\)-(\(\dfrac{1}{2}\))\(^4\)
c)(-\(\dfrac{1}{3}\))\(_7\).3\(^7\)
d)(5-\(\dfrac{1}{5}\)+\(\dfrac{1}{6}\))-(4-\(\dfrac{1}{5}\)+\(\dfrac{5}{6}\))-(3-\(\dfrac{1}{2}\)-\(\dfrac{1}{6}\))
2.tìm x
a)/x+\(\dfrac{3}{4}\)/-\(\dfrac{1}{2}\)=0
b)(x-1)\(^2\)-1=(-2)\(^3\)
c)1-(3-x)\(^3\)=(-13).2
d)(2-x)\(^4\)-17=3\(^2\).(-2)
Bài 1
a)\(\left(-\dfrac{2}{3}\right).\dfrac{3}{11}-\left(\dfrac{4}{3}\right)^2.\dfrac{3}{11}\)
\(=\dfrac{3}{11}.\left[\left(-\dfrac{2}{3}\right)-\left(\dfrac{4}{3}\right)^2\right]\)
\(=\dfrac{3}{11}.\left[\left(-\dfrac{2}{3}\right)-\dfrac{4}{3}.\dfrac{4}{3}\right]\)
\(=\dfrac{3}{11}.\left[\left(-2\right).\dfrac{4}{3}\right]\)
\(=\dfrac{3}{11}.\left(-\dfrac{8}{3}\right)\)
\(=-\dfrac{24}{33}\)
