Given the finite arithmetic sequence: 5; 1; 3; ...; 83; 87

2.1Write down the fourth term (T_{4}) of the sequence.(1)

2.2Calculate the number of terms in this sequence(3)

2.3Calculate the sum of all the negative numbers in the sequence(3)

2.4Consider the sequence: 5; 1; 3; ... ; 83 ; 87; ...; 4187
Determine the number of terms in this sequence that will be exactly divisible by 5.(4)
(11)
[{"prnt":"2","num":"2.1","answer":""},{"prnt":"2","num":"2.2","answer":""},{"prnt":"2","num":"2.3","answer":""},{"prnt":"2","num":"2.4","answer":""}]