If 4^k + 4^k = (4^9)^(4^9) - 4^k, then k = ?	Pick one
A) 11/3	B) 4^11 - 1	C) 242	D) 3^10	E) 3^11 - 1
4^k + 4^k = (4^9)^4^9 -4^k   4*(4^k) = 4^ (16 * 4^9 ) = 4^(4^2 * 4^9) = 4(4^11)   4^k+1 = 4^(4^11)   So k+1 = 4^11   So k = 4^11 -1   Answer is 4^11 - 1
<result>B</result>
If 4^k + 4^k = (4^9)^(4^9) - 4^k, then k = ?