That is true. It is most commonly used with a piano and the bracket indicates that the staves are connected.
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The answer is D. Four. He wrote other music pieces but they were not symphonies.
Answer:It could be either F# or G#
Explanation:
If you’re familiar with the circle of fifths — or you just know your way around the key signatures — you may have noticed a few anomalies. For example, keys like B-sharp and F-flat major are seemingly absent, while others go by two names. When comparing C-sharp major and D-flat major, it's easy to see these notes are exactly the same.
C-sharp major: C# D# E# F# G# A# B#
D-flat major: Db Eb F Gb Ab Bb C
Likewise, their respective relative minors are also identical in tone.
A-sharp minor: A# B# C# D# E# F# G#
B-flat minor: Bb C Db Eb F Gb Ab