<p>Thanks, mathprof. I suppose what I was trying to get at was: <opinion>The use of a calculator as in #3 mainly helps you learn how to use a calculator, and is not much help in learning calculus. </opinion></p>
<p>I’ve certainly done 1, 2, and 4 in “real life” (though usually on a computer of various types), but never #3.</p>
<p>How about you guys?</p>