Question

TÍNH GIÁ TRỊ BIÊU THỨC

\(A=\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+...+\frac{9}{98.99}+\frac{9}{99.100}\)

Answer 1

A=9.(1/1.2+1/2.3+1/3.4+....+1/98.99+1/99.100)

A=9.(1/1-1/2+1/2-1/3+...+1/98-1/99+1/99-1/100)

A=9.(1-1/100)

A=9.99/100

A=901/100

Answer 2

901/100

Answer 3

901/100

Answer 4

901/100

Answer 5

901/100

k minh di may ban oi . Ai k minh , minh k lai 3 cai luon

Answer 6

901/100

Answer 7

\(\frac{901}{100}\)nhé

Nếu cần bạn có thể kb vs mk mk giảng cho

Answer 8

\(A=\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+.......+\frac{9}{98.99}+\frac{9}{99.100}\)

\(A=9.\left(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+.......+\frac{1}{98.99}+\frac{1}{99.100}\right)\)

\(A=9.\left(\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-...+\frac{1}{98}-\frac{1}{99}+\frac{1}{99}-\frac{1}{100}\right)\)

\(A=9.\left(1-\frac{1}{100}\right)\)

\(A=9.\frac{99}{100}=\frac{891}{100}\)

Bạn tự rút gọn nha (nếu rút gọn được)

Answer 9

viết dâu / như thế nào vậy

nếu bt viết thi mình mới làm dc

Answer 10

901/100 nhe .

Answer 11

\(A=\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+...+\frac{9}{98.99}+\frac{9}{99.100}\)

\(A=\frac{9}{1}-\frac{9}{2}+\frac{9}{2}-\frac{9}{3}+\frac{9}{3}-\frac{9}{4}+... +\frac{9}{98}-\frac{9}{99}+\frac{9}{99}-\frac{9}{100}\)

\(A=\frac{9}{1}-\frac{9}{100}\)

\(A=\frac{900}{100}-\frac{9}{100}\)

\(A=\frac{891}{100}\)