# Calculate 0.5 + 0.5^2 + 0.5^3 + ... + 0.5^20

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Calculate 0.5 + 0.5^2 + 0.5^3 + ... + 0.5^20

Using your calculator, find the value of
$0.5 + 0.5^2 + 0.5^3 + \, ... \, + 0.5^{20}$

USING Mode 3,5 e^x
input the following data
X Y
1 0.5
2 0.52
3 0.53
Press AC
Shift Sigma (AlphaX shift stat y caret, 1,20)=0.9999990463 The sum of 1st to the 20th term of the sequence

Mode 1:

Thank you for this the best shortcut method..

Welcome

Hey! btw do you know the bartender problem that is a bit similar to your task? Here it is: an infinitive quantity of mathematicians walks in the bar. First mathematician orders a glass of beer, the second one orders a half of glass of beer, the third one orders a 1/4 of glass of beer, the next one orders a 1/8 of glass of beer....and so on. The issue is how many FULL glasses of beer should bartender give to them? I work at https://handmadewritings.com as a content writer, but sometimes I like to solve math problems! waiting for your responces.