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## #1 2022-12-01 20:11:16

tony123
Member
Registered: 2007-08-03
Posts: 219

### interval

if the two roots of the equation

are elements of the interval
find the interval of

Last edited by tony123 (2022-12-01 20:11:49)

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## #2 2022-12-01 20:48:19

Bob
Registered: 2010-06-20
Posts: 9,608

### Re: interval

hi tony123

It's worth trialling different k values using the grapher here:
https://www.mathsisfun.com/data/function-grapher.php

You'll find that x = 1/4 is always the vertical line of symmetry, so one limit will be found by finding the equation when the graph goes through (1,0)

And as k becomes more positive the curve shifts up and eventually fails to cross the x axis at all. That should give you the other limit.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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