tìm a \(\frac{108}{135}\)=\(\frac{a}{195}\)
tìm a biết 108/135 = a/195
Ta có :
\(\frac{108}{135}=\frac{4}{5}\)
\(\frac{4}{5}=\frac{156}{195}\)
Vậy :
a=156
108/135 = 4/5
Vậy a/195 = 4/5
a/195 = 156/195
Suy ra a = 156
Tìm a biết 108/135=a/195
to cung co bai nhu vay nhung khong biet lam
tim a 108/135=a/195
108/135=a/195
Số a là : 195x108:135=156
đáp số:156
số a là :195 x108:135 =156
Đáp số 156
um ba la xin h
108/135=a/195
108/135=a/195
a=(108.195):135=....tu tinh
k minh nhe
108/135=a/195
ta có 108/135=a/195
số a là :
195x108:135=156
Đáp số:156
=> a x 135 = 108 x 195
=> a x 135 = 21060
=> a = 21060 : 135 = 156
Nhớ k cho mình nha
a,\(\frac{18}{81}\) b, \(\frac{108}{180}\) c, \(\frac{81}{108}\) d, \(\frac{135}{162}\)
khoanh vao so bang phan so\(\frac{54}{72}\)
\(A=2-\frac{2^3}{35}-\frac{2}{63}^3-\frac{2}{99}^3-\frac{2}{142}^3-\frac{2}{195}^3-\frac{2}{255}^3-\frac{2}{323}^3\)
Tìm A
giải cả bài nha
\(A=2-\left(\frac{2^3}{25}+\frac{2^3}{63}+...+\frac{2^3}{255}+\frac{2^3}{323}\right)\)
\(=2-4.\left(\frac{2}{35}+\frac{2}{63}+...+\frac{2}{255}+\frac{2}{323}\right)\)
\(=2-4.\left(\frac{2}{5.7}+\frac{2}{7.9}+...+\frac{2}{15.17}+\frac{2}{17.19}\right)\)
\(=2-4.\left(\frac{1}{5}-\frac{1}{7}+\frac{1}{7}-\frac{1}{9}+...+\frac{1}{15}-\frac{1}{17}+\frac{1}{17}-\frac{1}{19}\right)\)
\(=2-4.\left(\frac{1}{5}-\frac{1}{19}\right)\)
\(=2-4.\frac{14}{95}=2-\frac{56}{95}=\frac{134}{95}\)
cho \(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{107}+\frac{1}{108}\);\(B=\frac{108}{1}+\frac{107}{2}+\frac{106}{3}+...+\frac{2}{107}+\frac{1}{108}\).tính\(\frac{A}{B}\)