Chris_Malcolm
Approximation of Pi by continued fraction
This is the Casio fx-83GT PLUS calculator, a cheap school calculator sufficiently limited in its abilities to be used in most of the maths exams which allow calculators to be used. Its big selling point is that you can enter formulae just as they're written in your textbook. That extends to writing continued fractions as descending trees as illustrated here. Strictly speaking that "16" should be "15+1/1", but to have written it like that would have caused the expression to scroll upwards off the screen.
This shows the rather good approximation of Pi as 355/113, which you can select on the calculator as an alternative form of answer display.
Oiginal: DSC05733X
Approximation of Pi by continued fraction
This is the Casio fx-83GT PLUS calculator, a cheap school calculator sufficiently limited in its abilities to be used in most of the maths exams which allow calculators to be used. Its big selling point is that you can enter formulae just as they're written in your textbook. That extends to writing continued fractions as descending trees as illustrated here. Strictly speaking that "16" should be "15+1/1", but to have written it like that would have caused the expression to scroll upwards off the screen.
This shows the rather good approximation of Pi as 355/113, which you can select on the calculator as an alternative form of answer display.
Oiginal: DSC05733X