Is 1/P > R/(R²+2)? 1). P=R 2). R>0 OA is C. While I choose A. first, we can dedrive from the inequality above : 1/P > R/(R²+2)=>R²+2>R*P accoding to 1), the new inequality could be R²+2>R², sufficient 2). not sufficient. Any comment?

1/P > R/(R²+2)=>R²+2>R*P The corss multiplication is not allowed since we dont know p,r are negative or positive. If its positive then what u did is ok but we dont know from stm I since all we know is p=r.If its negative the inequality reverses. This is a trap which we can fall in to when manipulating inequalities. Q: Is 1/p > r/r^2+2 Stmt I p=r Is 1/r > r/r^2+2 (or) Is 1/r-r/r^2+2 >0 (or) Is r^2+2-r^2/r(r^2+2) > 0 (or) Is 2/ r(r^2+2) > 0 We have no idea if r is positive or negative so INSUFF Stmt II r > 0 No idea about p. INSUFF Together: since r>0, 2/ r(r^2+2) > 0 always greater than 0 Choose C Hope this helps ;let me know if u still hv questions. Regards, CR

cramya wrote:1/P > R/(R²+2)=>R²+2>R*P The corss multiplication is not allowed since we dont know p,r are negative or positive. If its positive then what u did is ok but we dont know from stm I since all we know is p=r.If its negative the inequality reverses. This is a trap which we can fall in to when manipulating inequalities. Q: Is 1/p > r/r^2+2 Stmt I p=r Is 1/r > r/r^2+2 (or) Is 1/r-r/r^2+2 >0 (or) Is r^2+2-r^2/r(r^2+2) > 0 (or) Is 2/ r(r^2+2) > 0 We have no idea if r is positive or negative so INSUFF Stmt II r > 0 No idea about p. INSUFF Together: since r>0, 2/ r(r^2+2) > 0 always greater than 0 Choose C Hope this helps ;let me know if u still hv questions. Regards, CR woow~~~