You have to try to guess the rule that is indicated by the first few terms in the sequence, and then find a formula that involves a variable such as "n". This may involve some experimenting.
6 Σn 2 What is n?? Please answer
You can use summation notation.
.....5 .....Σ 9r ...r=1
Rests
The cross product of two vectors, A and B, can be represented using summation notation as: (A x B)i ijk Aj Bk where i, j, and k are indices representing the components of the resulting vector, and ijk is the Levi-Civita symbol.
4Σ (12 - 4i)i=0
Thorium-232 is typically indicated with the notation "Th-232."
It is not clear whether the question is 3a + 4a + 5a + 6a^3 which would be 12a + 6a^3 or 3a + 4a + 5a + (6a)^3 = 12a + 216a^3 or (3a + 4a + 5a + 6a)^3 = 5832*a^3 But none of these really require summation notation!
Staff lines indicated pitch.
Tt's impossible to answer this without the notation.
The position of notes on the lines and spaces of the staff
All notation is 'secular'. There are no religious ways of notating music. Even early notation indicated a degree of rhythm, which later became more precise.