Question

P = \(\frac{1}{1.2}\)+ \(\frac{2}{2.4}\)+  \(\frac{3}{4.7}\)+ .....+  \(\frac{10}{46.56}\)

LÀM GIÚP MIK VS,,,CẢM ƠN

Answer 1

=1/1-1/2+1/2-1/4+...+1/46-1/56

=1-1/56

55/56

Answer 2

=1-1/2+1/2-1/4+1/4-1/7+...+1/46-1/56 =1-1/56(vì giản ước hết rồi) =55/56 Mình ko viết đc p/s Đảm bảo kết quả đúng 100%

Answer 3

\(P=\frac{1}{1\cdot2}+\frac{2}{2\cdot4}+\frac{3}{4\cdot7}+...+\frac{10}{46\cdot56}\)

\(\Rightarrow P=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+...+\frac{1}{46}-\frac{1}{56}\)

\(\Rightarrow P=1-\frac{1}{56}\)

\(\Rightarrow P=\frac{55}{56}\)

Answer 4

\(P=\frac{1}{1.2}+\frac{2}{2.4}+\frac{3}{4.7}+...+\frac{10}{46.56}\)

\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+...+\frac{1}{46}-\frac{1}{56}\)

\(=1-\frac{1}{56}\)

\(=\frac{55}{56}\)

Vậy  \(P=\frac{55}{56}\)

Answer 5

\(\frac{55}{56}\)