Question

Tỉ số giữa A và B biết

\(A=\frac{7!.4!}{10!}.\left(\frac{8!}{3!.5!}-\frac{9!}{2!.5!}\right)\)

\(B=\frac{2}{\left(-3\right)^4}\)

Answer 1

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Answer 2

= 1965,6 thì phải

Answer 3

Ta có:  \(A=\frac{7!.4!}{10!}.\left(\frac{8!}{3!.5!}-\frac{9!}{2!.5!}\right)\)

                \(=\frac{1}{30}.\left(56-1512\right)\)

                   \(\frac{1}{30}-\left(-1456\right)=\frac{43681}{30}\)

Ta lại có: \(B=\frac{2}{\left(-3\right)^4}=\frac{2}{81}\)

\(\Rightarrow\frac{A}{B}=\frac{43681}{30}:\frac{2}{81}=\frac{1179387}{20}\)

Mình không chắc nha bạn

Answer 4

Tỉ số là -9828/5