Question

in an AP the first term is 3 and the last term is 27 the 15th term from the 1st and 15th term from the last are the same then the common difference is​

Answer 1

Step-by-step explanation:

$a = 3$

$l = 27$

$t15 = t12$

$a + 14d = a + 11d$

$a - a + 14d - 11d = 0$

$3d = 0$

$d = 0$