posted by Lillian

Approximate e^-0.6 to 3 decimal places.
I am not sure how to approach this without a calculator. I don't think we are allowed to use a calculator but I'm not 100% sure on that either.

  1. Steve

    well, it is easy enough with a calculator; there's an e^x button.

    can you use Taylor Series?
    e^x = 1 + x + 1/2 x^2 + 1/6 x^3 + ...
    1 + (-.6) = 0.4
    1 + (-.6) + (-.6)^2/2 = 0.58
    ...+(-0.6)^3/3!+(-0.6)^4/4! = 0.5494
    ...+(-0.6)^5/5!+(-0.6)^6/6! = 0.5488

    what other approximation tools are available to you?

  2. Lillian

    We haven't learned the Taylor Series. But it's okay! Luckily enough we're allowed to use a calculator :) Thank you!

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