Question

If r is irrational, then 1/r is irrational
prove

Answer 1

use the contrapostive

Answer 2

lets prove:
if 1/r is rational, then r is rational

Answer 3

what myininaya said

Answer 4

what satellite said

Answer 5

I see a waterloo math student. O_o

Answer 6

:)

Answer 7

we should work together =P

Answer 8

ok

Answer 9

is mcw also one?

Answer 10

do you still need or require more help?

Answer 11

so how would u prove the contrapossitive of than

Answer 12

+1

Answer 13

if 1/r is rational then it could be written as a/b where a and b are integers
(we are assuming r does not =0)
if 1/r=a/b
then r=b/a
therefore r is rational

Answer 14

contrapositive of if P then Q is if not Q then not P and they are equivalent. so you show that if 1/r is rational, then so is r. that proves it

Answer 15

what myininaya said

Answer 16

:)

Answer 17

thx