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a(a-1)(a+1)(a-2) > 0how does this imply –a is less than -1 , a is greater than 2 , 0 is less than a and a is less than 1 Please explain..

a(a-1)(a+1)(a-2) > 0how does this imply –a is less than -1 , a is greater than 2 , 0 is less than a and a is less than 1 
Please explain..

Grade:

2 Answers

Aditya Gupta
2075 Points
2 years ago
applying wavy curve method (which is usually taught in coaching classes and can also be found in rd sharma jee mathematics), we see that the real line is divided into 5 parts by -1,0,1,2.
so, a is less than -1, or between 0 to 1, or grater than 2.
Deepak Kumar Shringi
askIITians Faculty 4405 Points
2 years ago
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