Question

the sum of the ap 2,7,12....to 10 terms​

Answer 1

t1=a=2,t2=7 ,t3= 12, t10=?,n=10

d=t2-t1=7-2=5

d= t3- t2=12-7= 5

given sequence of an A.P.

tn=a+(n-1)d

t10= 2+(10-1)×5

t10=2+9×5

t10=2+45

t10=47