Question

the sum of first n term of an ap is given by sn=4n²+n.find that ap.​

Answer 1

Answer:

sn 5 , 18

Step-by-step explanation:

to find ap n = 1 , 2 , 3 , 4...........so on

putting n = 1

sn = 4(1)+ 1 = 5

putting n =2

sn = 4(4) + 2 = 18

so on so forth