\(a,\dfrac{1}{2}-\dfrac{4}{7}-\dfrac{13}{14}=\dfrac{7-8-13}{14}=-\dfrac{14}{14}=-1\)
\(b,\left(-\dfrac{10}{7}\right):\left(\dfrac{5}{7}+\dfrac{15}{7}\right)=-\dfrac{10}{7}:\dfrac{20}{7}=-\dfrac{10}{20}=-\dfrac{1}{2}\)
\(c,\dfrac{2^{17}.3^8}{2^6.3^6.2^9}=\dfrac{2^{17}.3^8}{2^{15}.3^6}=2^2.3^2=4.9=36\)
2.\(4^{17}=2^{34}\)
\(8^{11}=2^{33}\)
\(=>4^{17}>8^{11}>4^{17}\)
\(a.2x=\dfrac{7}{6}-\dfrac{3}{4}\)
\(2x=\dfrac{5}{12}\)
\(x=\dfrac{5}{12}:2\)
\(x=\dfrac{5}{24}\)
\(b.=>x.16=4.9\)
\(x.16=36\)
\(x=36:16\)
\(x=2,25\)