Answer:

3,7,11

Step-by-step explanation:

an=3+(n-1)4

=3+(1-1)4

=3+(0)4

=3+0

=3

For the second term;

a2=3+(2-1)4

=3+(1)4

=3+4

=7

For the third term;

a3=3+(3-1)4

=3+(2)4

=3+8

=11

HOPE IT HELPS!!^_^