If the first four terms of an arithmetic sequence are `a, 2a, b` and `a -6-b` for some numbers `a` and `b`, then the value of the `100th` term is:

If the first four terms of an arithmetic sequence are a,2a,b and (a-6-b) for some numbers a and b, find the sum of the first 100 terms of the sequence.

If the first four terms of an arithmetic sequence are a,2a,b and (a-6-b) for some numbers a and b, find the sum of the first 100 terms of the sequence.

If the first four terms of an arithmetic sequence are a,2a,b and (a-6-b) for some numbers a and b, find the sum of the first 100 terms of the sequence.

If the first four terms of an arithmetic sequence are a,2a,b and (a-6-b) for some numbers a and b, find the sum of the first 100 terms of the sequence.

If the first four terms of an arithmetic sequence are a,2a,b and (a-6-b) for some numbers a and b, find the sum of the first 100 terms of the sequence.

Sum of the first 4 terms of an arithmetic sequence is 72. Sum of the first 9 terms is also 72. What is the 5th term of the sequence?

If the first, second and last terms of an arithmetic series are a,b, and c respectively, then the number of terms is

If the first, second and last terms of an arithmetic series are a,b and c respectively , then the number of terms is

The sum of the first 25 terms of an arithmetic sequence is 1,400, and the 25th term is 104. If the first term of the sequence is a_(1) and the second term is a_(2) , what is the value of a_(2)-a_(1) ?

If 3/2, 5/3, 11/6 are the first three terms of an arithmetic sequence, find the first integer term in this sequence.