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.
There are no sharps in the key signature, but in the harmonic minor there is a G#.
F major and its relative harmonic minor, D minor, have only b flat.
No. Parallel key signatures share the same tonic, or starting note. Relative minor/major are the scales that share a key signature.
Each major key has a relative minor key and vice versa. For example a key signature with one sharp can refer to either the G major or the e minor keys. For major keys there is only one scale type. For minor keys there are 3: pure, harmonic, and melodic. In pure(natural) minor none of the scale degrees are altered. In harmonic minor the seventh scale degree is raised half a step. In melodic minor the seventh and the sixth scale degrees are raised half a step, ascending and returned to their pure minor descending.
"Fm" is shorthand for the key of F minor, a key signature with four flats.
The key signature for a harmonic minor scale typically has raised seventh note compared to the natural minor scale.
The key signature of the harmonic minor scale typically has raised seventh note compared to the natural minor scale.
There are no sharps in the key signature, but in the harmonic minor there is a G#.
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.
F major and its relative harmonic minor, D minor, have only b flat.
The key signature for the harmonic minor scale changes depending on what key you are playing the scale in. For example, if you were to play a C harmonic minor you would play C minor (Bb, Eb, Ab) but sharp the seventh of the note (in this case, the Bb to B natural). This is just adding the leading tone into the scale. So, just to recap, play the minor version of the scale but add a sharped 7th. Now you have a harmonic minor.
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.
The harmonic minor scale, in relation to the natural minor scale, has a raised 7th scale degree. This happens with the use of accidentals rather than the key signature.
A minor has no key signature.
The minor key with 1 sharp is B minor. In the key of B minor, the F# is the raised seventh degree, which is characteristic of the harmonic minor scale. This key signature gives B minor its distinctive sound, often associated with a somber or melancholic mood.
The key signature of E minor is F#.