Final answer:
To evaluate the expression (1)/(a-1) with a=6, we replace 'a' with 6 giving us (1)/(6-1), which simplifies to 0.2.
Step-by-step explanation:
The expression given is an (1)/(a-1); and we need to substitute a value of a=6. To evaluate the expression (1)/(a-1) when a=6, you simply replace the variable 'a' with 6 in the expression, which becomes (1)/(6-1). This simplifies to (1)/(5), since 6-1 equals 5.
To obtain the final value, we perform the division, which results in:
1 divided by 5 = 0.2
Therefore, the expression (1)/(a-1) evaluated at a=6 is 0.2.