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Mathematics 18 Online
OpenStudy (anonymous):

Someone check my answer for this problem? I just found a random image of a composite function so i can practice finding domain and range? I will post the picture. The answer i got is: D;[ 0,5 ] R: [1,5]

OpenStudy (anonymous):

OpenStudy (anonymous):

@amistre64

OpenStudy (anonymous):

hello :D

OpenStudy (ccswims):

Well which line are you looking at?

OpenStudy (anonymous):

both

OpenStudy (ccswims):

g(x) or f(x)

OpenStudy (ccswims):

ok

OpenStudy (anonymous):

im answering for g(f(x))

OpenStudy (anonymous):

for f(g(x)) domain and range is [-4,4] and range is [-2,4]

OpenStudy (math&ing001):

The domain of a composite function is the more restrictive domain or the intersection of the domains.

OpenStudy (anonymous):

so did i find it right?

OpenStudy (math&ing001):

Not quite, intersection of [0,6] and [-4,4] is [0,4].

OpenStudy (math&ing001):

The range is correct though.

OpenStudy (anonymous):

for which one?

OpenStudy (anonymous):

cause i followed this. http://openstudy.com/users/lordofpens#/updates/543f0ab3e4b0bad12946b988

OpenStudy (math&ing001):

For the first g(f(x)).

OpenStudy (anonymous):

ok let me see check

OpenStudy (anonymous):

i get [0.5] for the domain though

OpenStudy (anonymous):

OpenStudy (anonymous):

and to get the range, i plugged in [0,5] in f(x) and found the range of [-2,4] and i plugged this range into g(x) and got the range of [1,5]

OpenStudy (math&ing001):

Yeah f(5)=5 in [1,5]. You're right ! Checked the second, also correct.

OpenStudy (anonymous):

@pgpilot326

OpenStudy (anonymous):

can i have your input since you taught me how to do it as well :D?

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