Tính `A=4/7.31+6/7.41+9/10.41+7/10.57`. Vĩnh biệt! 17/07/2021 Bởi Valerie Tính `A=4/7.31+6/7.41+9/10.41+7/10.57`. Vĩnh biệt!
Đáp án + Giải thích các bước giải: `A=4/7.31+6/7.41+9/10.41+7/10.57` `=> A=[5.4]/[5(7.31)] + [5.6]/[5(7.41)]+[5.9]/[5(10.41)]+[5.17]/[5(10.57)]` `=> A=\frac{20}{35.31}+\frac{30}{35.41}+\frac{45}{50.41}+\frac{35}{50.57}` `=> A=5*(\frac{4}{35.31}+\frac{6}{35.41}+\frac{9}{50.41}+\frac{7}{50.57})` `=> A=5*(\frac{1}{31}-\frac{1}{35}+\frac{1}{35}-\frac{1}{41}+\frac{1}{41}-\frac{1}{50}+\frac{1}{50}-\frac{1}{57})` `=> A=5*(1/31-1/57)` `=> A=5*26/1767` `=> A=130/1767` Bình luận
`A=(4)/(7.31)+(6)/(7.41)+(9)/(10.41)+(7)/(10.57)` `⇔A=(5.4)/(31.35)+(5.6)/(35.41)+(5.9)/(41.50)+(5.7)/(50.57)` `⇔A=5((4)/(31.35)+(6)/(35.41)+(9)/(41.50)+(7)/(50.57))` `⇔A=5 .(1/(31)-1/(35)+1/(35)-1/(41)+1/(41)-1/(50)+1/(50)-1/(57))` `⇔A=5. (1/(31)-1/(57))` `⇔A=5.(26)/(1767)` `⇔A=(130)/(1767)` Bình luận
Đáp án + Giải thích các bước giải:
`A=4/7.31+6/7.41+9/10.41+7/10.57`
`=> A=[5.4]/[5(7.31)] + [5.6]/[5(7.41)]+[5.9]/[5(10.41)]+[5.17]/[5(10.57)]`
`=> A=\frac{20}{35.31}+\frac{30}{35.41}+\frac{45}{50.41}+\frac{35}{50.57}`
`=> A=5*(\frac{4}{35.31}+\frac{6}{35.41}+\frac{9}{50.41}+\frac{7}{50.57})`
`=> A=5*(\frac{1}{31}-\frac{1}{35}+\frac{1}{35}-\frac{1}{41}+\frac{1}{41}-\frac{1}{50}+\frac{1}{50}-\frac{1}{57})`
`=> A=5*(1/31-1/57)`
`=> A=5*26/1767`
`=> A=130/1767`
`A=(4)/(7.31)+(6)/(7.41)+(9)/(10.41)+(7)/(10.57)`
`⇔A=(5.4)/(31.35)+(5.6)/(35.41)+(5.9)/(41.50)+(5.7)/(50.57)`
`⇔A=5((4)/(31.35)+(6)/(35.41)+(9)/(41.50)+(7)/(50.57))`
`⇔A=5 .(1/(31)-1/(35)+1/(35)-1/(41)+1/(41)-1/(50)+1/(50)-1/(57))`
`⇔A=5. (1/(31)-1/(57))`
`⇔A=5.(26)/(1767)`
`⇔A=(130)/(1767)`