Câu hỏi của Hiếu

Question

4¹⁵ x 5³⁰=?

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

Ngô Thị Hương Giang · Accepted Answer

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

Câu trả lời:

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

Sarah · Answer

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

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

$=1-\frac{1}{100}$

$=\frac{99}{100}$

Câu trả lời:

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

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

$=1-\frac{1}{100}$

$=\frac{99}{100}$