Practice problem
Check all that apply. [?]⋅0=0[?]\cdot0=0[?]⋅0=0
R\mathbb{R}R (set of all real numbers)
000
1a\frac{1}{a}a1 if a≠0a\ne0a=0
∞\infty∞
Type a concept, like “slope” or “photosynthesis”.
