Question

A(w)= sqrt w^2+13, find A(r+1)=

Answer 1

A(w) = sqrt(W^2+13)

A(r+1) = sqrt((r+1)^2+13)
A(r+1) = sqrt(r^2+2r+1+13)
A(r+1) = sqrt(r^2+2r+14)