Question

So sánh : a) A= 10/2^7+ 10/2^6 và B= 11/2^7+9/2^6

Answer 1

Ta có \(A=\frac{10}{2^7}+\frac{10}{2^6}=\frac{10}{2^7}+\frac{20}{2^7}=\frac{30}{2^7}\)

Lại có \(B=\frac{11}{2^7}+\frac{9}{2^6}=\frac{11}{2^7}+\frac{18}{2^7}=\frac{29}{2^7}\)

Vì \(\frac{30}{2^7}>\frac{29}{2^7}\)

=> A > B