Tính biểu thức sau
----- Nội dung dịch tự động từ ảnh -----
b) \( B = \frac{5^{4.15}9^{4.30}8^{5.2}}{5^{2.6}8^{7.23}2^{7.5}} \)
c) \( C = \frac{1 + \frac{1}{3} + \frac{1}{9} + \frac{1}{27}}{\frac{2 + \frac{2}{3} + \frac{2}{9} + \frac{2}{27}}{1 + \frac{1}{7} + \frac{1}{49} + \frac{1}{343}}} \)
d) \( D = \left(1 + \frac{1}{3}\right)\left(1 + \frac{1}{8}\right)\left(1 + \frac{1}{15}\right)\left(1 + \frac{1}{2499}\right) \)
b) \( B = \frac{5^{4.15}9^{4.30}8^{5.2}}{5^{2.6}8^{7.23}2^{7.5}} \)
c) \( C = \frac{1 + \frac{1}{3} + \frac{1}{9} + \frac{1}{27}}{\frac{2 + \frac{2}{3} + \frac{2}{9} + \frac{2}{27}}{1 + \frac{1}{7} + \frac{1}{49} + \frac{1}{343}}} \)
d) \( D = \left(1 + \frac{1}{3}\right)\left(1 + \frac{1}{8}\right)\left(1 + \frac{1}{15}\right)\left(1 + \frac{1}{2499}\right) \)