Question

[Nguyễn Thảo Minh]

y-1/2-1/6-1/12-1/20-1/30-1/42=1.Tìm y

Answer 1

[ngo hoang nhat]

Y=\(\frac{13}{7}\)

Answer 2

[༺༒༻²ᵏ⁸]

\(y-\frac{1}{2}-\frac{1}{6}-\frac{1}{12}-\frac{1}{20}-\frac{1}{30}-\frac{1}{42}=1\)

\(y-\frac{210}{420}-\frac{70}{420}-\frac{35}{420}-\frac{21}{420}-\frac{14}{430}-\frac{10}{420}=1\)

\(y-\frac{210-70-35-21-14-10}{420}=1\)

\(y-\frac{60}{420}=1\)

\(y-\frac{1}{7}=1\)

\(y=1+\frac{1}{7}\)

\(y=\frac{7}{7}+\frac{1}{7}\)

\(y=\frac{8}{7}\)