PP-T2-DS8

[Huang Hsin-Yi]

8. 563-!-item-!-187;#058&000288
If n and p are integers, is p > 0 ?

(1) n+1>0
(2) np > 0

Ans:C

(1)n+1>0 --> n>-1.................insufficient
(2)np>O
n+ p+
n- P-.....................................insufficient

(1)(2)
若n=-0.5, 則p=-
若n=2 , 則p=+

這樣答案怎會是C勒

[amazingslim]

If n and p are integers
(1)n>-1
(2)np > 0
so n=\=0
then n>=1

[Huang Hsin-Yi]

拍細,拍細
一時眼小,感謝amazingslim提點