If 6^k + 6^k = (6^9)^(6^9) - 6^k, then k = ?
Choose the correct choice from the following answers:
A) 11/3	B) 11/2	C) 242	D) 6^11 - 1	E) 3^11 - 1
6^k + 6^k = (6^9)^6^9 - 6^k   6*(6^k) = 6 ^ (36 * 6^9 ) = 6^(6^2 *6^9) = 6^(6^11)   6^k+1 = 6^(6^11)   So k+1 = 6^11   So k = 6^11 -1   Answer is 6^11 - 1
<result>D</result>
If 6^k + 6^k = (6^9)^(6^9) - 6^k, then k = ?