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\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{6}+\frac{1}{32}\)
\(\frac{4+2+1}{8}+\frac{1}{6}+\frac{1}{32}\)
\(\frac{9}{8}+\frac{1}{6}+\frac{1}{32}\)
\(\frac{9}{8}+\frac{1}{32}+\frac{1}{6}\)
\(\frac{36+32}{32}+\frac{1}{6}\)
\(\frac{68}{32}+\frac{1}{6}=\frac{17}{8}+\frac{1}{6}\)
\(\frac{51+4}{24}=\frac{55}{24}\)
\(\left(1+\frac{1}{2}\right)\left(1+\frac{1}{3}\right)\left(1+\frac{1}{4}\right)...\left(1+\frac{1}{99}\right)\)
\(=\frac{3}{2}\cdot\frac{4}{3}\cdot\frac{5}{4}\cdot...\cdot\frac{100}{99}\)
\(=\frac{100}{2}=50\)
\(\frac{1}{2}\div\frac{3}{4}+\frac{1}{6}\div\frac{3}{4}\)
\(=\frac{3}{4}\div\left(\frac{1}{2}+\frac{1}{6}\right)\)
\(=\frac{3}{4}\div\frac{2}{3}\)
\(=\frac{9}{8}\)
\(\frac{1}{2}\div\frac{3}{4}-\frac{1}{6}\div\frac{3}{4}\)
\(=\left(\frac{1}{2}-\frac{1}{6}\right)\div\frac{3}{4}\)
\(=\frac{1}{3}\div\frac{3}{4}\)\
\(=\frac{4}{9}\)
1/2 : 3/4 + 1/6 : 3/4 = 1/2 x 4/3 + 1/6 x 4/3 = 4/3 x (1/2 + 1/6) = 4/3 x 2/3 = 8/9
1/2 : 3/4 - 1/6 : 3/4 = 1/2 x 4/3 - 1/6 x 4/3 = 4/3 x (1/2 - 1/6) = 4/3 x 1/3 = 4/9
cau 1
gia su tren co n so 1
=>tong tren la n
cau 2
4+6=8
k mik nhe
tự hỏi tự trả lời vậy
4+6=8