Question

4¹⁵ x 5³⁰ =?

 

11/12+11/12x23+11/23+34+...+11/78+89+11/89+100 = ?

 

Answer 1

4^15 x 5^30 = 2^30 x 5^30 = 10^30

Answer 2

\(\frac{11}{1.12}+\frac{11}{12.23}+\frac{11}{23.34}+.......+\frac{11}{78.89}+\frac{11}{98.100}\)

\(=1-\frac{1}{12}+\frac{1}{12}-\frac{1}{23}+....+\frac{1}{89}-\frac{1}{100}\)

\(=1-\frac{1}{100}\)

\(=\frac{99}{100}\)