Question

Use the rational roots theorem to form a list of possible rational roots of 3x^7+5x^3-4=0

I have started this problem but am stuck...

Answer 1

make all possible fractions where the numerator divides 4 and the denominator divides 3

Answer 2

they look like this
\[\pm1,\pm2,\pm4,\pm\frac{1}{3},\pm\frac{2}{3},\pm\frac{4}{3}\]

Answer 3

hmm ok I was close I had the right idea. thanks how did you decide to use those numbers?

Answer 4

grind it til you find it
start with the easy ones like 1 and -1
btw no one says the actual roots have to be any of these
just the POSSIBLE RATIONAL ROOTS

Answer 5

oh ok I see what you did, makes much more sense then my book! Thank you!