Answer:
634
Step-by-step explanation:
Nth term of an arithmetic progression is given by:
Tn=a+(n-1)d
Where 'Tn' is the Nth term of A.P. , 'a' is the first term of A.P. , 'n' is the no. of terms and 'd' is the common difference.
22-13=9, 31-22=9, 40-31=9.
So, d=9
a=13
n=70
Put the values in the Formula.
T70=13+(70-1)*9=13+69*9=13+621=634
