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If f(x) = ax^(2) + bx + c find f^(1) (1)...

If `f(x) = ax^(2) + bx + c` find `f^(1) (1)`.

A

`a+2b`

B

`2a -b`

C

`a-2b`

D

`2a +b`

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • If f(x) = ax^(2) + bx + c such that f(-1), f(0) and f(1) are in A.P., then which of the following is correct?

    A
    `c = b`
    B
    `b ne 0`
    C
    `c ne 0`
    D
    `a =0`

  • Let f(x) =ax^(2) + bx + c and f(-1) lt 1, f(1) gt -1, f(3) lt -4 and a ne 0 , then

    A
    `a gt 0`
    B
    `a lt 0`
    C
    sign of a cannot be determined
    D
    none of these

  • If f (x) =ax ^(2) + bx + 2 and f (1) =3, f (4) =42, then a and b respectively are

    A
    `-3,2`
    B
    `3,2`
    C
    `-2,3`
    D
    `3,-2`

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