This is from my calculus PSET:

5. (Weekly Problem #1 is now due. Here it 15:} Match each expression on the left to the expression on the right which is equal to it. Give a brief explanation of your choices. 5 d. (a) Zfbz Where $3 = % and 3;: = 1 + his (A) 0 x) (I: k=1 5 5 ' _ I _ (h) nhzkjdz where An: 5 and :k 1 km (E) 1 x) (I: - _ a _ __ (c) nhjgmkjz where An: n and I}; 1 km {C} D (d) uh_1>n Z kaAm where An: = % and n; = 15A: (D) None of the above k=l Note: As you can see, it's important to be really careful with notation