Question

so sánh M = 1/1.2 + 1/2.3 +...+1/49.5o với 1

 

Answer 1

M = 1/1.2 + 1/2.3 + ... + 1/49.50

M = 1 - 1/2 + 1/2 - 1/3 + ... + 1/49 - 1/50

M = 1 - 1/50

M = 49/50

Mà M = 49/50 nên M < 1

Vậy : M < 1

Answer 2

M = 1/1.2 + 1/2.3 +...+1/49.50

=1-1/2+1/2-1/3+...+1/49-1/50

=1-1/50<1 

Vay M<1

Answer 3

M = 1/1.2 + 1/2.3 + ... + 1/49.50

M = 1 - 1/2 + 1/2 - 1/3 + ... + 1/49 - 1/50

M = 1 - 1/50

M = 49/50

Mà M = 49/50 nên M < 1

Vậy : M < 1

Answer 4

M = 1/1.2 + 1/2.3 + ... + 1/49.50

M = 1 - 1/2 + 1/2 - 1/3 + ... + 1/49 - 1/50

M = 1 - 1/50

M = 49/50

Mà M = 49/50 nên M < 1

Vậy : M < 1

Answer 5

M = 1/1.2 + 1/2.3 + ... + 1/49.50 M = 1 - 1/2 + 1/2 - 1/3 + ... + 1/49 - 1/50 M = 1 - 1/50 M = 49/50 Mà M = 49/50 nên M < 1 Vậy : M < 1