Question

tính 

B=(2.4.10+4.6.8+14.16.20)/(3.6.15+6.9.12+21.24.30)

Answer 1

\(B=\frac{\left(80+192+4480\right)}{\left(270+648+15120\right)}\)

     \(=\frac{4752}{16038}\)

       \(=\frac{8}{27}\)

Answer 2

vì sao??

Answer 3

bạn tính như bt là ra mà ???

Answer 4

B=(2.4.10+4.6.8+14.16.20)/(3.6.15+6.9.12+21.24.30)

B=2(1.2.5+2.3.4+7.8.10)/3(1.2.5+2.3.4+7.8.10)

B=2/3