\(\frac{51}{92}\)

Tích nha

51/92

tui chịu

B=-4/5+4/5²-4/5³+...+4/5²⁰⁰

5B=-4+4/5-4/5²+...+4/5²⁰¹

5B+B=-4+4/5²⁰⁰

6B=-4x5²⁰⁰/5²⁰⁰+4/5²⁰⁰

6B=-4+4x5²⁰⁰/5²⁰⁰

Còn lại bạn tính nốt nha

thank you

\(A=\left(3+\frac{1}{2}-\frac{2}{3}\right)-\left(2-\frac{2}{3}+\frac{5}{2}\right)-\left(5-\frac{5}{2}+\frac{4}{3}\right)\)

\(A=3+\frac{1}{2}-\frac{2}{3}-2+\frac{2}{3}-\frac{5}{2}-5+\frac{5}{2}-\frac{4}{3}\)

\(A=\left(3-2-5\right)+\left(\frac{2}{3}-\frac{2}{3}\right)+\left(\frac{5}{2}-\frac{5}{2}\right)+\frac{1}{2}-\frac{4}{3}\)

\(A=-4+\frac{1}{2}-1-\frac{1}{3}\)

\(A=-5+\frac{1}{2}-\frac{1}{3}\)

\(A=-5+\frac{1}{6}\)

\(A=-4\frac{5}{6}\)

tích đúng mình làm cho

 \(\frac{5}{11}.\frac{3}{7}+\frac{5}{7}.\frac{4}{11}-\frac{3}{11}\)

\(=\frac{3}{11}.\frac{5}{3}.\frac{3}{7}+\frac{5}{7}.\frac{4}{3}.\frac{3}{11}-\frac{3}{11}\)

\(=\frac{3}{11}.\left(\frac{5}{7}+\frac{20}{21}-1\right)\)

\(=\frac{3}{11}.\left(\frac{15+20}{21}-1\right)\)

\(=\frac{3}{11}.\left(\frac{35}{21}-1\right)\)

\(=\frac{3}{11}.\frac{14}{21}\)

\(=\frac{14}{77}\)

5/11 x 3/7 + 5/7 x 4/11 - 3/11

= 5/11 x 3/7 + 5/11 x 4/7 - 3/11

= 5/11 x ( 3/7 + 4/7 ) - 3/11

= 5/11 x 1 - 3/11

= 5/11 - 3/11

= 2/11

Tk nha !!

Trả lời

\(P=\frac{\frac{2}{3}-\frac{1}{4}+\frac{5}{11}}{\frac{5}{12}+1-\frac{7}{11}}\)

\(\Leftrightarrow P=\frac{\frac{8}{12}-\frac{3}{12}+\frac{5}{11}}{\frac{5}{12}+\frac{12}{12}-\frac{7}{11}}\)

\(\Leftrightarrow P=\frac{\frac{5}{12}+\frac{5}{11}}{\frac{17}{12}-\frac{7}{11}}\)

\(\Leftrightarrow P=\frac{\frac{55}{132}+\frac{60}{132}}{\frac{187}{132}-\frac{84}{132}}\)

\(\Leftrightarrow P=\frac{\frac{115}{132}}{\frac{103}{132}}\)

\(\Leftrightarrow P=\frac{115}{132}\)