Question

if a=4 ,d=2 and a/n=40 then find n​

Answer 1

Answer:

19

Step-by-step explanation:

just use the formula a+(n-1) d

Answer 2

Step-by-step explanation:

an = a+(n-1)d

40 = 4 +(n-1)2

40-4 = (n-1)2

36 = (n-1)2

36/2 = (n-1)

18 = n-1

18+1 = n

n = 19