Question

B=(19998:18-14443:13)x(1/3- 1/5+1/7-1/9+1/11)+2019

Answer 1

1234 nha

Answer 2

bạn có thể giải ra giúp mk k

Answer 3

\(B=\left(\frac{19998}{18}-\frac{14443}{13}\right)\left(\frac{1}{3}-\frac{1}{5}+\frac{1}{7}-\frac{1}{9}+\frac{1}{11}\right)+2019\)

\(B=\left(101\cdot\frac{198}{18}-101\cdot\frac{143}{13}\right)\left(\frac{1}{3}-\frac{1}{5}+\frac{1}{7}-\frac{1}{9}+\frac{1}{11}\right)+2019\)

\(B=\left[101\cdot\left(\frac{198}{18}-\frac{143}{13}\right)\right]\left(\frac{1}{3}-\frac{1}{5}+\frac{1}{7}-\frac{1}{9}+\frac{1}{11}\right)+2019\)

\(B=101\cdot0\cdot\left(\frac{1}{3}-\frac{1}{5}+\frac{1}{7}-\frac{1}{9}+\frac{1}{11}\right)+2019\)

\(B=0+2019=2019\)