|q⟩ Bad Qubits

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Multiple choice
The raising operator acts as L+l,m=l(l+1)m(m+1)l,m+1L_+ |l,m\rangle = \sqrt{l(l+1) - m(m+1)} |l,m+1\rangle. For l=1/2l = 1/2 and m=1/2m = -1/2, what is the coefficient l(l+1)m(m+1)\sqrt{l(l+1) - m(m+1)}?