The function f has the properties $f(x+y)=x+f(y)$ and $f(0)=5$ .
What is the value of $f(100)$ ?

Correct answer marked below

100

105

Correct

140

155

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What this question tests

Your ability to evaluate and compose functions, including unusual defined operations.

Applying function operations in the wrong order or ignoring domain restrictions.

The function f has the properties f(x+y)=x+f(y)f(x+y)=x+f(y)f(x+y)=x+f(y) and f(0)=5f(0)=5f(0)=5. What is the value of f(100)f(100)f(100)?