\(\left(\dfrac{1}{4}\right)^5.4^5=\left(\dfrac{1}{4}.4\right)^5=1^5=1\)
tìm giá trị của biểu thức sau:
a)\(\left(\dfrac{1}{4}\right)^5.4^5\)
\(=\dfrac{1^5}{4^5}.\dfrac{4^5}{1}\)
\(=\dfrac{1^5}{1}\)
\(=1\)
Ta có:
\(\left(\dfrac{1}{4}\right)^{^5}.4^5=\dfrac{1^5}{4^5}.4^5=\dfrac{1^5.4^5}{4^5}=1^5=1\)