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標題:
maths
發問:
∵(Y+3)(Y-1) ∴Y>1 or Y<-3 點解唔係Y>-3
最佳解答:
(Y+3)(Y-1) > 0 If is true in two cases: 1) (Y+3)>0 and (Y-1)>0 Y>-3 and Y>1 Therefore Y>1 satisfy both requirement. 2) (Y+3)<0 and (Y-1)<0 Y<-3 and Y<1 Therefore Y <-3 satisfy both requirement. From (1) and (2) The answer for Y is Y>1 or Y<-3
其他解答:
maths
發問:
∵(Y+3)(Y-1) ∴Y>1 or Y<-3 點解唔係Y>-3
最佳解答:
(Y+3)(Y-1) > 0 If is true in two cases: 1) (Y+3)>0 and (Y-1)>0 Y>-3 and Y>1 Therefore Y>1 satisfy both requirement. 2) (Y+3)<0 and (Y-1)<0 Y<-3 and Y<1 Therefore Y <-3 satisfy both requirement. From (1) and (2) The answer for Y is Y>1 or Y<-3
其他解答:
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