Tính :
a) \(\frac{2^{12}x3^5-4^6x9^2}{\left(2^2x3\right)^6+8^4x3^5}\)
b) \(\frac{1}{9x10}\)\(-\)\(\frac{1}{8x9}\)\(-\)\(\frac{1}{7x8}\)\(-\)\(\frac{1}{6x7}\)\(-\)\(\frac{1}{5x6}\)\(-\)\(\frac{1}{4x5}\)\(-\)\(\frac{1}{3x4}\)\(-\)\(\frac{1}{2x3}\)\(-\)\(\frac{1}{1x2}\)
c) \(\frac{1}{2}:\left(-1\frac{1}{2}\right):1\frac{1}{3}:\left(-1\frac{1}{4}\right):1\frac{1}{5}:\left(-1\frac{1}{6}\right):.....:\left(-1\frac{1}{100}\right)\)
Làm đc phần nào thì gúp mk với . ToT