A) simplify the expression a + a/a-1 b) find its value at a = 0.1. in response, write down the number obtained.

A + a / (a - 1)

= a(a - 1) + a

    (a - 1)

=  a^2 - a + a
   
       a -  1

=    a^2
       Answer
     a - 1

When a = 0.1  it =   (0.1)^1 / 0.1 - 1  =  -0.0111  or -1/90 as a fraction