Question

Choose the correct answer from the given four options: In an AP, if d = –4, n = 7, an = 4, then a is *

Answer 1

$a = 28.$

Step-by-step explanation:

${a}n = a + (n - 1)d$

$4 = a + (7 - 1)( - 4)$

$4 = a + 6( - 4)$

$4 = a + ( - 24)$

$4 = a - 24$

$4 + 24 = a$

$28 = a$

(OR)

$a = 28.$