Question

tính giá trị của các biểu thức

B= x +\(\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}\)        với x = \(\frac{1}{3}\)

Answer 1

B=\(\frac{1}{3}+\frac{-0,175+\frac{5}{11}}{0,2625-\frac{15}{22}}\)

B=\(\frac{1}{3}+\frac{\frac{123}{440}}{-\frac{369}{880}}\)

B=\(0,2161148416\)

Answer 2

 Thay x vào ta có: 

\(B=\frac{1}{3}+\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}\)

\(B=\frac{1}{3}+\frac{\frac{2}{10}-\frac{375}{1000}+\frac{5}{11}}{-\frac{3}{10}+\frac{9}{16}-\frac{15}{22}}\)

\(B=\frac{1}{3}+\frac{\frac{1}{5}-\frac{3}{8}+\frac{5}{11}}{-\frac{3}{10}+\frac{9}{16}-\frac{15}{22}}\)

\(B=\frac{1}{3}+\frac{\frac{123}{440}}{\frac{-369}{880}}\)

\(B=\frac{1}{3}+\frac{123}{440}.\frac{880}{-369}\)

\(B=\frac{1}{3}+\frac{-2}{3}\)

\(B=\frac{-1}{3}\)

Vậy...