Answer :
Step-by-step explanation:
Let n term of this is 78 .
So , an = a+(n-1)d
78= 3+(n-1)5
78 =3 +5n-5
78=-2+5n
5n-2=78
5n =78+2
5n =80
n=80/5
n=16
- 16th term of the AP: 3,8,13,18,.....is 78
Step-by-step explanation:
Let n term of this is 78 .
So , an = a+(n-1)d
78= 3+(n-1)5
78 =3 +5n-5
78=-2+5n
5n-2=78
5n =78+2
5n =80
n=80/5
n=16