The A Major Chord is found in the A Major Scale: A B C# D E F# G# A. It is made up of the 1 (root note), 3 and 5 positions of this scale. In other words, the notes A,C# and E. Now to add more depth to the sound of the chord you add another A and E. The A note is at the root of the chord meaning the top of the chord shown in the diagram below.
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