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If fig. 3.21 graph of y = ax^(2) + 2bx ...

If fig. 3.21 graph of `y = ax^(2) + 2bx + c` is given Which one of the following is not true ?

A

`a gt 0`

B

`b gt 0`

C

`c gt 0`

D

`b^(2) lt ac`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Shows graph of y= ax^(2) + bx + c . Then which one of the following is not true.

    A
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    B
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    C
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  • Consider that f(x) =ax^(2) + bx +c, D = b^(2)-4ac , then which of the following is not true ?

    A
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    B
    If `a lt 0`, then maximum value of f(x) is `(-D)/(4a)`
    C
    if `a gt 0,D lt 0`, then `f(x) gt 0` for all x ` in ` R
    D
    If `a gt 0, D gt 0` , then `f(x) gt 0` for alll ` x in R`

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