a.A={16;27;38;49}

b.B={41;82}

c.C={59;68}

12 nhé

\(\frac{8}{13}+\frac{9}{8}-\frac{3}{8}+\frac{5}{13}\)

\(=\left(\frac{8}{13}+\frac{5}{13}\right)+\left(\frac{9}{8}-\frac{3}{8}\right)\)

\(=1+\frac{3}{4}\)

\(=\frac{7}{4}\)

=100 nha bn

bằng 4 đó bạn

x=70-12-6-8

x=44

(2.x+1)^4=3^4

suy ra 2.x+1=3

             2.x=2

                x=1