The first term of an arithmetic progression is and the common difference is . The sum of the first terms is .
If , what can be deduced about the signs of and ?
Aboth and are negative
B is positive and is negative
C is negative and is positive
D is negative, but the sign of cannot be deduced
E is negative, but the sign of cannot be deduced
Fneither the sign of nor the sign of can be deduced