Question

find the average value of f(x)=e^xsqrd on the interval (-1/4,1/4)
a).272
b).545
c)1.090
d)2.180
e)4.360
sooo confuseddd

Answer 1

you cant integrate that function right away its one of those functions that cannot be integrated

Answer 2

it can be done using a computer software

Answer 3

f) sooo confuseddd

Answer 4

why not?

Answer 5

i dont remember learning this at all and i cant find it in my notes

Answer 6

if you read your textbook carefully it says you cannot integrate that function

Answer 7

also is that -x^2 at the top??

Answer 8

yes you can, you use usub with the integrals of a^x rule

Answer 9

better done this way
http://www.wolframalpha.com/input/?i=1%2F%281%2F4+-+%28-1%2F4%29%29+%28integrate+e%5Ex2+from+-1%2F4+to+1%2F4%29

Answer 10

thanks,but still dont get it.

Answer 11

what year are you in?

Answer 12

calculus in 12th

Answer 13

lol yeah for sure, tell the teacher why are you giving us these questions you cannot solve this (Y)

Answer 14

yeah for sure what?

Answer 15

you cannot solve this integral without the help of a computer software like how @experimentX used wolfram

Answer 16

http://www.wolframalpha.com/input/?i=integrate+e%5Ex%5E2+
doesn't even look like error function ... says imaginary error function.

Answer 17

theres another way, there has to be, otherwise it wouldnt be on an old AP exam

Answer 18

trust me, you just leave the integral as is

Answer 19

i agree ... i don't know the exact reason ... but somehow you can't.

Answer 20

well that sucks, thanks

Answer 21

the other way even sucks more
http://www.wolframalpha.com/input/?i=integrate+%281%2Bx^2%2Bx^4%2F2%2Bx^6%2F6%2Bx^8%2F24%2Bx^10%2F120%29+from+0+to+1%2F4

Answer 22

it does but it actually kinda helped