Yup, its official, usher is the king of r n b.
It isnC0*A^n*b^0 + nC1*A^(n-1)*b^1 + ... + nCr*A^(n-r)*b^r + ... + nCn*A^0*b^n where nCr = n!/[r!*(n-r)!]
The coefficient of x^r in the binomial expansion of (ax + b)^n isnCr * a^r * b^(n-r)where nCr = n!/[r!*(n-r)!]
W. B. R. King was born in 1889.
POP, R n B
he sings a lil r n b
T r+1 = (n / r) (a ^n-r) x (b)^r
R n b
pop and R 'n' B
Well, he is the King of R&B, so...a lot.
C-A-N-B-E-R-R-A
Wonderful by R Kelly