Question

a=8,d=12,an=-880,n=?
​

Answer 1

Answer:

n = 77

Step-by-step explanation:

an = 880

But an = a + ( n - 1 )d = 8 + ( n - 1 )12

=> 880 = 8 + 12n - 12

=> n = ( 880 - 8 + 12 ) / 12

=> n = 884 / 12 = 77

Answer 2

a= 8

d= 12

an= -880

Since, an = a +(n-1)d

So,

-880 = 8+(n-1)12

-880 = 8+ 12n -12

-880= 12n -4

-880+4 = 12n

12n = -876

n= -876/12

n= -73

But Number of terms can't be expressed as negative.

So, this is wrong..

hope it will help u ✨