Question

According to Descartes Rule of Signs, which of the following is false?


Select one:


a. The number of positive zeroes of the function is the number of sign changes of the coefficients of the function - or less by an even number.

b. The number of negative zeroes of the function is the number of sign changes of the coefficients of the negative function - or less by an even number.

c. The number of negative zeroes of the function is the number of negative numbers of the function - or less by an even number.

d. The number of negative zeroes involves using the inverse function.

Answer 1

which one do you think?

Answer 2

@ganeshie8

Answer 3

I think C

Answer 4

so clearly not d
Ah okay by negative function they mean f(-x)

Answer 5

so nope C is not right

Answer 6

so we canceled out C and D?

Answer 7

A and B both seem right. I am just trying to figure out which if one of them is wrong.

Answer 8

Sorry, I am just reading this rule for the first time

Answer 9

it ok')

Answer 10

i guess its D

Answer 11

They're both right as far as I can tell.
You simply look at the number of sign changes of the coefficients of the function

Answer 12

should I tag someone else to see which one is correct

Answer 13

Is it expected that only one answer choice is correct?
Or is it possible that multiple answer choices are correct and you have to pick all of them?

Answer 14

no only one can be chosen

Answer 15

Hm, can you check the wording then for answer choices A and B?
Because they both read correctly to me

Answer 16

this is ho I copied and pasted it

Answer 17

A. The number of positive zeroes of the function is the number of sign changes of the coefficients of the function - or less by an even number.

B. The number of negative zeroes of the function is the number of sign changes of the coefficients of the negative function - or less by an even number.

Answer 18

well let's do one example and you can see what I mean