Question

n an A. P if a = -18 , n= 10 and an = 0 then d =

Answer 1

Answer:

The answer is $d=2$

Step-by-step explanation:

Given first term  $a=-18$

Number of terms $n=10$

and nth term $a_n=0$

Since we know that general(nth) term is given by $a_n=a+(n-1)d$

$\Rightarrow 0=-18+(10-1)d\\\Rightarrow 18=9d\\\Rightarrow d=\frac{18}{9}=2$