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karthikpandian19
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(1) |K^3| + 1 > Kkarthikpandian19 wrote:Is K a positive number?
(1) |K^3| + 1 > K
(2) K + 1 > |K^3|
|K^3| > K-1
for K=1
1>0
for K=-1
1>-2
Insufficient
(2) K + 1 > |K^3|
K+1 will always be positive
lets say |K^3| = 1/8
K+1 > 1/8
K > -7/8
Insufficient
Combinig the two statements
|K^3| -1 < K < |K^3| + 1
K=-1/2
1/8-1 < -1/2 < 1/8+1
-7/8 < -1/2 < 9/8
K=1
1-1 < 1 < 1+1
0 < 1 < 2
Insufficient
Option E
