what is (a=1-frac{1}{b}) and (b=1-frac{1}{c}), find the value of (c-frac{1}{a})

Hi what is a good thing to study in college and univeristy to give many opportunties for job options?

i want to be a doctor can any of your career help me out

What is your advice for someone interested in a career in mathematics?

I struggle a bit with memorising Pythagoras theorem, what are some tips?