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if ab gt 0 " and " 3a + 5b +15 c=0 then...

`if ab gt 0 " and " 3a + 5b +15 c=0` then which of the following statement is INCORRECT ?

A

there exist exactly one root of equation `ax^(4) +bx^(2) +c=0` in (-1,0)

B

there exist exactly one root equation `ax^(4)+bx^(2) +c=0` in (0,1)

C

there exist exactly two root of equation `ax^(4) +bx^(2) +bx^(2) +c=0` in (-1,1)

D

number of roots of equation `ax^(4) +bx^(2) c=0` can be two in (-1,0)

Text Solution

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The correct Answer is:
D
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