Question

In an AP if an=3+4n then find the value of a4

Answer 1

1. Step-by-step explanation:
2. an=3+4n
3. put n=1,2,3,4
4. a1=3+4*1=3+4=7
5. a2=3+4*2=3+8=11
6. a3=3+4*3=3+12=15
7. a4=3+4*4=3+16=19
8. a4=19 ans.