Using the Intermediate Value Theorem and a calculator, find an interval of length 0.01 that contains

Semaj Christian

Semaj Christian

Answered question

2022-06-21

Using the Intermediate Value Theorem and a calculator, find an interval of length 0.01 that contains a root of x 5 x 2 + 2 x + 3 = 0, rounding off interval endpoints to the nearest hundredth.

I've done a few things like entering values into the given equation until I get two values who are 0.01 apart and results are negative and positive ( 1.15 & 1.16), but these answers were incorrect.

I'm at the point where I'm thinking there is not enough information to solve. Any ideas?

Answer & Explanation

humbast2

humbast2

Beginner2022-06-22Added 21 answers

f ( x ) = x 5 x 2 + 2 x + 3
As you can see f ( 0 ) = 3 > 0 and f ( 1 ) = 1 < 0

Thus there is at least one root of f ( x ) = 0 in Interval ( 1 , 0 )

Now calculate the value of
f ( 1 2 ) = 55 32 > 0
Thus now our interval is shortened and it is ( 1 , 1 2 )
f ( 3 4 ) = 717 1024 > 0
Our interval is now ( 1 , 3 4 )
f ( 7 8 ) = 935 32768 < 0
Our interval is now ( 7 8 , 3 4 )

similarly, keep doing until you get the desired result

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