Question

evaluate the integral (5)/(sqrt(10x+2))dx

A. sqrt(x^2+x)+C
B. .5(sqrt(x^2+x)+C
C. 1/(sqrtx^2+x)+C
D. sqrt(2x+1)+C
E. none

Answer 1

u-substitution integral\[u=10x+2\implies du=10dx\]

Answer 2

so it's E??

Answer 3

I don't think so
what is your integral after making the u-substitution?

Answer 4

put sqt<10x+2>as u......u will get it........

Answer 5

actually I don't think I see the right answer on there...
are you sure there are no typos here?

Answer 6

i think its none

Answer 7

Oh I'm sorry I read D for E
@quyenthuy820 was correct :p

Answer 8

thank you guys!

Answer 9

yeah it should be \[\sqrt{10 x+2}\]

Answer 10

lol turing :p

Answer 11

yes none of these answer is in [log{sqt<10x+2>}]/2

Answer 12

well a little dyslexia makes math more fun anyway ;)

Answer 13

evaluate (cos3x)/(sin3x)dx ??

i got: 1/3log(sin(3x))

is that correct?

Answer 14

yes :)

Answer 15

+C

Answer 16

evaluate (e^x)/(2-e^x)dx

i got -log(2-e^x)+C ??

Answer 17

yes it's also right, but...
could you please post each Q separately from now on? them's the rules.
thanks