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Mainak Chakraborty Grade: Upto college level
`        If α is a repeated root of ax2 + bx + c = 0, then Limx→α tan(ax2 + bx + c) / (x - α)2 is ???`
7 years ago

## Answers : (1)

147 Points
```										Dear Mainak
α is a repeated root of ax2 + bx  + c = 0
so   ax2 + bx  + c=a(x-α)2
now  Limx→α tan(ax2 + bx +  c) / (x - α)2
=Limx→α [tana(x-α)2 ]/ (x - α)2
=Limx→α a[tana(x-α)2 ]/ a(x - α)2
=a             because   Limx→0 tanx /x   = 1
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```
7 years ago
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