Polynomials of Higher Degree (VCE SSCE Mathematical Methods): Quizzes

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Polynomials of Higher Degree
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What is the degree of a quartic function?

4

In f(x)=ax4+bx3+cx2+dx+ef(x) = ax^4 + bx^3 + cx^2 + dx + e, why must a0a \neq 0?

The x4x^4 term would disappear

What is the maximum number of x-intercepts a quartic function can have?

4

Which statement about odd degree polynomials is true?

Must have at least one x-intercept

If P(a)=0P(a) = 0, what does the factor theorem tell us?

(xa)(x-a) is a factor of P(x)P(x)

What happens at an x-intercept where a factor is raised to an even power?

Graph touches but doesn't cross

For quartic with positive leading coefficient a>0a > 0, what is the end behavior?

Both ends up

How do you find the y-intercept of a quartic function?

Set x=0x = 0 and calculate yy

Which is NOT a possible number of x-intercepts for a quartic function?

5

For (x1)2(x+1)2(x-1)^2(x+1)^2, where are the zeros?

x=1x = 1 and x=1x = -1

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