Hhjjjbhjjjbgubgyuhggyhbghujjhhhhghhhghhhhgghhh
#sol1
a1=1×4-1=3
a2=2×4-1=7
a3=3×4-1=11
a4=4×4-1=15
a5=5×5-1=19
#sol2
f(1)=1×4-1=3,
f(n+1)=f(n)+4,
so .... you know.
A. As we observe more numbers, we will always get closer to the actual average.
2.1 is already in a decimal form.
Hope I helped!
