Question

For an A.P.  if tn=12 and d=-10 then find a​

Answer 1

Step-by-step explanation:

tn = 12

d = 10

tn = a + ( n - 1) d

12 = a + ( 12 - 1 ) 10

12 = a + 11 x 10

12 - 11 = a x10

12 - 11 = a

10

6 - 11 = a

5

-5 = a

5

a = -1

Answer 2

Answer:

a = 110

Step-by-step explanation: