Suppose f(x) = sqrt(24+2x^(2))
a) find exact value of y when y=f(7)
b)find exact value of x when f(x)=6
The calculator gives me 11.045 and 9.79..then i did it graphically, i still end up getting the same thing.. What am I doing wrong? how do you do it?

Question

anonymous · Answer

it is right. what's the problem??? :P

anonymous · Answer

That's what I'm saying! I put the answers online, and it says they're both wrong. I tried making them fractions, which would be...2209/200.. and it still says they are wrong.

anonymous · Answer

try sqrt (122) for the first

anonymous · Answer

lol wow..that one worked

anonymous · Answer

the second one should be sqrt 6

anonymous · Answer

~_~ that is stupid seriously...I even ended up providing all the decimals[since it says exact value], and it still told me they were wrong.

anonymous · Answer

Hmm the second one is not sqrt(6). At least thats what the site said..if I leave it in square root, I end up getting sqrt(96)

anonymous · Answer

ehh???? there is only a certain amt of decimals your calci can show, but not all. surds form is exact. and, your second answer was wrong, what you had written see this: |dw:1318138782420:dw|