Question

The 12th term of an AP is – 28 and 18th term is – 46. Find its first term and common
difference.

Answer 1

Answer:$a=5$. $d=-3$

Step-by-step explanation:

$T12=-28$

$T18=-46$

$a+11d=-28$

$a+17d=-46$

By solving these two equations, we have,

d=-3 ,a=5

Hope it helps you......

Answer 2

Answer:

Step-by-step explanation:

See the attached document