Question

A= 1.2.3+2.3.4+.......+99.100.101

Answer 1

Kết quả là : \(\frac{5049}{20200}\)

Answer 2

A = 1.2.3 + 2.3.4 + ... + 99.100.101

=> 4A = 1.2.3.4 + 2.3.4.4 + ... + 99.100.101.4

=> 4A = 1.2.3.4 + 2.3.4.(5 - 1) + ... + 99.100.101.(102 - 98)

=> 4A - 1.2.3.4 + 2.3.4.5 - 1.2.3.4 + ... + 99.100.101.102 - 98.99.100.101

=> 4A = 99.100.101.102

=> A = 99.100.101.102  :4

=> A = 25497450

Answer 3

\(=\frac{5049}{20200}\)

Code : Breacker

Answer 4

4A = 1.2.3.4 +2.3.4.4+ ......+99.100.101.4

=1.2.3.4 +2.3.4(5-1)+......+99.100.101(102-98)

sau đó tách ra rồi trừ đi ta đc

99.100.101.102

rồi bn tính ra là đc

Answer 5

4A=1.2.3.4+2.3.4.4+3.4.5.4+...+99.100.101.4

    =1.2.3.4-1.2.3.4+2.3.4.5-2.3.4.5+3.4.5.6+...-98.99.100.101+99.100.101.102

    =99.100.101.102

    =101989800

Answer 6

A=25497450