Calculate Integral of e^(-|x|) Without a Calculator

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How do I calculate the intergral of e^(-|x|) ("e to the minus absolute value of x") without a calculator?
 
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welcome to pf!

hi reidwilson! welcome to pf! :smile:

(try using the X2 icon just above the Reply box :wink:)
reidwilson said:
How do I calculate the intergral of e^(-|x|) ("e to the minus absolute value of x") without a calculator?

same way as ∫ e-x dx or ∫ ex dx,

except you need to do the cases of x < 0 and x > 0 separately :wink: