Only "B flat" is the key signature, then "C sharp" is the accidental.
There is no key signature for D harmonic minor in particular - as the raised seventh is not part of the key signature. In all clefs, D minor has one flat and in all cases (since the raised seventh in this scale is C♯), to avoid confusion it is best to avoid having both a sharp and a flat in the same key signature.
There is not three notes in any scale or key, if you are asking about the accidentals, there is one flat (Bb) in the key signature plus an additional C sharp for the harmonic minor scale.
D minor - more specifically, D harmonic minor (the version of the minor scale with a flat 6 and a sharp 7). However, you will never see a key signature with a B flat and a C sharp. The key signature will only contain B flat.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
D major and B minor.
There is no key signature for D harmonic minor in particular - as the raised seventh is not part of the key signature. In all clefs, D minor has one flat and in all cases (since the raised seventh in this scale is C♯), to avoid confusion it is best to avoid having both a sharp and a flat in the same key signature.
F major and its relative harmonic minor, D minor, have only b flat.
There is not three notes in any scale or key, if you are asking about the accidentals, there is one flat (Bb) in the key signature plus an additional C sharp for the harmonic minor scale.
D minor - more specifically, D harmonic minor (the version of the minor scale with a flat 6 and a sharp 7). However, you will never see a key signature with a B flat and a C sharp. The key signature will only contain B flat.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
D minor.
The key signature for D Minor is 1 flat. Here is the difference between D major and D minor: D Major: D E F# G A B C# D D Minor: D E F G A Bflat C D However, there are 3 commonly used forms of Minor Scales. The above is called the "natural minor", or Aeolian Mode. In the harmonic minor scale, the 7th note is raised one semitone, to C#. However, this added sharp does not appear in the key signature. In the melodic minor scale, the 6th and 7th notes are raised in ascending, to B and C#, but restored to the natural minor form in descending. However, these changes do not appear in the key signature. In the D minor pentatonic scale, used frequently in Rock, only the following notes are used: D - F G A - C D This form can be notated with or without a key signature, but a key signature of one flat (Bb) lets us know that D is the tonic!
D major and B minor.
G-sharp natural minor has five sharps (F♯, C♯, G♯, D♯, A♯) but the raised seventh degree turns the F♯ into Fx (F double sharp). So the key of G-sharp harmonic minor has four sharps and one double sharp.I hope that helps.
The key signature for D sharp minor would be the one for F sharp major: FCGDAE. You can also think of it as E flat minorwhich is related to g flat major in which the key signature would be BEADGC.
A harmonic minor is a natural minor with a raised seventh. For example, starting with a major key: C Major C D E F G A B C A natural minor A B C D E F G A A harmonic minor A B C D E F G# A
One flat in the key signature indicates that the music is in the key of F major or D minor.