Section 19.6 gives two formulas for a down-and-out call. The first applies to the situation where the

Question:

Section 19.6 gives two formulas for a down-and-out call. The first applies to the situation where the barrier, H, is less than or equal to the strike price, K. The second applies to the situation where H > K. Show that the two formulas are the same when H = K.

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