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For which of the following graphs of the...

For which of the following graphs of the quadratic expression `f(x)=ax^(2)+bx+c`, the product of abc is negative

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
`:'Cut -off Y-axis, put `x=0` i.e. `f(0)=c`
Option (a) `alt0,clt0,-b/(2a)lt0`
or `alt0,clt0,blt0`
`:.abclt0`
Option b `alt0,cgt0,-b/2agt0`
or `alt0,cgt3,bgt0`
`:.abclt0`
Option c `agt0, cgt0, -b/(2a)gt0`
or `agt0,cgt0, blt0`
`:.abclt0`
Option (d) `alt0,clt0, -b/(2)lt0`
or `alt0,clt0,blt0`
`:.abclt0`
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