Question

The sum of 1st n terms of an ap is given sn=3n2-4n. Determine ap and 28th term

Answer 1

Answer:

-1,5,11..

t(28)=161

Step-by-step explanation:

tn= a+(n-1)d

a= -1

d= 6

ap= -1, 5, 11....

t(28)= -1 + 27*6

hence t(28)= 161