If a is the first term and r the common difference, then the nth term is
tn = a * (n-1)r
So t16 = a + 15r
Then 6*t16 = 6(a + 15r) or 6a + 90r
No further simplifiaction is possible.
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-4 is the first negative term. The progression is 24,20,16,12,8,4,0,-4,...
It is an Arithmetic Progression with a constant difference of 11 and first term 15.
Any number you like. You need two terms to uniquely identify an arithmetic progression.
It is not possible to answer this question without information on whether the terms are of an arithmetic or geometric (or other) progression, and what the starting term is.
A sequence where a particular number is added to or subtracted from any term of the sequence to obtain the next term in the sequence. It is often call arithmetic progression, and therefore often written as A.P. An example would be: 2, 4, 6, 8, 10, ... In this sequence 2 is added to each term to obtain the next term.