(

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) Select all of the following expressions that equal\

S=(1-6C)+(2-12C)+(4-18C)+(8-24C)+(16-30C).

\ (Here

C

is an arbitrary constant.)\ A.

\\\\sum_(k=1)^5 (2^(k-1)-6kC)

\ B.

-6C+\\\\sum_(k=0)^4 (2^(k)-6kC)

\ C.

\\\\sum_(k=0)^4 (2^(k)-6(k+1)C)

\ D.

(1)/(2)\\\\sum_(k=1)^5 (2^(k)-12kC)

\ E.

\\\\sum_(k=1)^5 (k-6kC)

\ F. None of the above

( ) Select all of the following expressions that equal S=(16C)+(212C)+(418C)+(824C)+(1630C). (Here C is an arbitrary constant.) A. k=15(2k16kC) B. 6C+k=04(2k6kC) c. k=04(2k6(k+1)C) D. 21k=15(2k12kC) E. k=15(k6kC) F. None of the above