Question

Which of the following integrals are divergent?
There are 3 functions there and I believe that the last 2 both diverge, am I doing something wrong? Because I can only choose 1 answer,

Answer 1

div means goes off into infinity right?

Answer 2

if it integrates to a value its convergent

Answer 3

yes

Answer 4

cosx comes from sinx

6 sinx from 0 to inf

well, im sure sinx bounces back and forth so it has no value at infinity ... but lets check the wolf just in case the althiemers is rearing up :)

Answer 5

lol, mkay

Answer 6

http://www.wolframalpha.com/input/?i=integrate+6cos%28x%29+from+0+to+infinity

doesnt converge, must diverge then

Answer 7

yeah, same thing I got, but I also got that the theta one diverges :/

Answer 8

the last one; is that sin(10t) dt ?

or sin(10) t dt

Answer 9

sin10(theta) d(theta) I believe

Answer 10

in either case, it doesnt converge either ... according to the wolf.

so in this case, is there a difference definition of divergent than the one of used to seeing?

Answer 11

DNE and divergent might be different ideas

Answer 12

Well, can't you say it diverges by TFD?

Answer 13

test for divergence? perhaps

Answer 14

the last 2 definantly diverge; maybe its a program error?

Answer 15

That really sucks of me then lol, I can only choose one...

Answer 16

for*

Answer 17

who grades it?

Answer 18

Automatically, by the computer

Answer 19

whats your grade at the moment :)

Answer 20

Lol, its about 93,ish

Answer 21

I'll try taking a screen shot and email it to the professor, if I miss it maybe he'll just give me the points :P

Answer 22

might just have to cross your fingers and click next ;)

Answer 23

thats possible too

Answer 24

Hope he's in a good mood, but thanks for the help!

Answer 25

good luck ..