Use synthetic division to determine whether the number k is an upper or lower bound (as specified for the real zeros of the function f).

k = 2; f(x) = 5x^4 + 4x^3 - 2x^2 + 2x + 4; Upper bound?

Question

Use synthetic division to determine whether the number k is an upper or lower bound (as specified for the real zeros of the function f).

k = 2; f(x) = 5x^4 + 4x^3 - 2x^2 + 2x + 4; Upper bound?

anonymous · Answer

help meeeee

abb0t · Answer

I'm logging off now.

anonymous · Answer

@abb0t okay.........:(

anonymous · Answer

@jim_thompson5910 you are back!!

jim_thompson5910 · Answer

are you familiar with synthetic division?

anonymous · Answer

yes!

jim_thompson5910 · Answer

ok what do you get when you perform synthetic division?

anonymous · Answer

5x^3+14x^2+26x+54 with 112 remainder!

jim_thompson5910 · Answer

very good

jim_thompson5910 · Answer

notice how each coefficient of the quotient is positive

anonymous · Answer

yes!

jim_thompson5910 · Answer

so this means that you have an upper bound

IF you got alternating signs, then you would have a lower bound

anything else would mean it's neither

anonymous · Answer

ohhhhh okay!! thankyou!! you are always the bestt:)

jim_thompson5910 · Answer

np