Question

find the middle term of an A. P 3,5,7,......71​

Answer 1

please help this question

Answer 2

a1=3,a2=5 ,d=2

an=a+(n-1)d

71=3+(n-1)2

71-3=(n-1)2

68=2n-2

68+2=2n

70=2n

70/2=n

35=n

35/2=middle term

a17or a18 is middle term

a17=a+16d

a17=3+16×2

a17=3+32

a17= 35