What is the Roman-numeral analysis of the progression below?

Question

BlackTom AI · Accepted Answer

I6–IV–V–I is correct because the actual pitches and bass-line positions identify an E major tonic in first inversion, an A major IV, a B major V (without a seventh), and a final E major root-position I.

1) Relevant knowledge points
- Roman numerals: I = tonic triad, IV = subdominant, V = dominant. 
- Inversion notation: “6” indicates first inversion (third of the triad in the bass). 
- V7 would require the added minor seventh above the root (the 4th scale degree above V) to be present.

2) Step-by-step identification from the score
- First chord: bass = G#; other voices contain E and B. Those three notes spell E–G#–B with G# in the bass → E major in first inversion → I6.
- Second chord: bass = A; other voices contain C# and E → A–C#–E → A major in root position → IV.
- Third chord: bass = B; other voices contain D# and F# → B–D#–F# → B major in root position → V.
- Fourth chord: bass = E; other voices contain G# and B → E–G#–B with E in the bass → E major root-position → I.

3) Intermediate “calculations” (spelling each triad)
- I6: G# (bass) + B + E → reorder = E–G#–B (I), G# in bass → I6.
- IV: A + C# + E → A–C#–E → IV (root).
- V: B + D# + F# → B–D#–F# → V (root). No extra note present to form B–D#–F#–A (V7).
- I: E + G# + B → I (root).

4) Why the correct answer is correct
The bass-line and chord spellings unambiguously show the tonic triad in first inversion, then the subdominant, then the dominant triad (without a seventh), resolving to the tonic in root position. That sequence corresponds to I6–IV–V–I.

5) Why the other options are incorrect
- I–IV–V–I: wrong for the first chord because the bass is G#, not E, so it is not root-position I.
- I6–IV–V7–I: incorrect because the V chord lacks the 7th (A) — only B–D#–F# are present.
- I–ii6–V7–I: ii6 would be F# minor in first inversion (notes F#–A–C# with A in bass), which doesn’t match the actual A–C#–E sonority; also V7 is absent.

6) Conclusion
All evidence confirms the Roman-numeral analysis I6–IV–V–I, matching the provided correct answer.

What is the Roman-numeral analysis of the progression below? 单项选择题

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