Question

what is the expand of (a+1/2)^3​

Answer 1

what is the expand of (a+1/2)³

It is nothing but expansion of (a+b)³

(a+b)³ = a³ + 3a²b + 3ab² + b³

(a+1/2)³ =  a³ + 3a²(1/2) + 3a(1/2)² + (1/2)³

            =  a³ + 3a²/2 + 3a/4 + 1/8