Find The Specific Variable On The Following Arithmetic Sequence​ 1. A1=-4,d=5,n=11,a…

find the specific variable on the following arithmetic sequence​

1. a1=-4,d=5,n=11,an=
2. a1=16,d=3,an=61,n=
3. d=3,n=17,an=113,a1=

Answer:

1. an=-4+(11-1)(5)= 46

2.n=16

3.a1= 65