How to prevent dobbel entry a value in google sheets

S

steffenanderson

New Member
Joined
Dec 13, 2020
Messages
1
Office Version
  1. 365
  2. 2019
Platform
  1. Windows
I have over 300 mails and I'm adding new mails everyday and don't want to enter a email twice, how can I prevent this? Im using google sheets
 

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Square and cube roots
The =SQRT(25) is a square root. For a cube root, use =125^(1/3). For a fourth root, use =625^(1/4).
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