Find all functions $f: \mathbb r \to \mathbb r$ that satisfy$$ f(x) + 3 f\left( \frac {x-1}{x} \right) = 7x $$for all nonzero $x$. note that the domain of $f$ is all real numbers. make sure you define your function everywhere!

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?