Question

if for an A.P , t2= 4 and d= -2 , then what is the value of a​

Answer 1

$t2 = 4 \\ d = - 2 \\ sapose \: \\ a = |?| \\ t2 = a + d \\ 4 = a+ ( - 2) \\ a = - 2 - 4 \\ | a = 6|$

Answer 2

$t2 = 4 \\ a + d = 4 \\ a - 2 = 4 \\ a = 6$