If r,s, and t are non zero integers, is (r^5)(S^3)(t^4) negative
1) rt is negative
2) s is negative
1) rt is negative
2) s is negative
Hey mate,
To know whether (r^5)(S^3)(t^4) is negative, we need to know what kind of numbers 's' and 'r' are. 't' doesn't matter since it is to the power 4 and hence it is always positive.
Statement 1 says 'rt' is negative. It implies either 'r' or 't' is negative. As we don't know which one of them is negative and what kind of an integer 's' is, we can't decide upon the stem. Hence INSUFFICIENT
Statement 2 says s is negative. No clue on what 'r' & 't' are. Hence INSUFFICIENT.
Combining, we have rt is negative and s is negative.
If we assume r is negative, then the whole stem would turn positive as 's' is already negative.
If we assume 't' is negative, the stem would then be negative.
Hence, INSUFFICIENT.
IMO E
