The first three terms of an arithmetic sequence are 1, 10 and 19, respectively. What is the value of the 27th term?
Notice the second term is 9 more than the first....
the 27th term will be 26 * 9 bigger than the first
1 + 26*9 = a27 = ___________
19 - 10 = 9
10 - 1 = 9
the 27th term is 1 + 9 * (27 - 1)
which is 1 + 9*28
which is 253
the value of the 27th term is 253
*** EDITED ***
which is 1 + 9*26 (as first Guest posted)
which is 235
the value of the 27th term is 235
