TT GWD-1-5

nlogroup

Q5:

Is x > k?

(1)
              2^x • 2^k = 4

(2)
              9^x • 3^k = 81

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

It seems like a very easy question. But I donot know why the answer is C?

My choice is evidently E. Pls NN confirm

lingling7615

根据第一个条件：x+k=2

第二个条件：2x+k=4

x=2 k=0

x>k

c

nlogroup

Thanks.

I thought 2^x*2^k= 2^(xk)

amy1028

THANKS!