#Functions questn

40 messages · Page 1 of 1 (latest)

last minnow
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we need to find domain of this function

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lime relicBOT
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primal elm
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The intersection of the left hand side with the union of the right hand side will produce your answer

last minnow
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I think I'm doing a silly mistake here... cuz the answer is
(-infinity, -1) U [0, infinity)

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last minnow
primal elm
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Aha, you did make a mistake

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It should be $x<-1$ lol, for $7^{-x}-7>0$

vale dirgeBOT
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Kocher

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primal elm
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You forgot to flip it

primal elm
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I see no other mistakes, and that should fix it

last minnow
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oh

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oh

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sorry

last minnow
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*this

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what to do with it... and you see that function isn't even defined for values greater than -1 and less than 0... so why am I even getting this interval

primal elm
last minnow
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eh? like for the right hand inequalities

solving for Nr and Dr both being negative we get
x>0
x > -1

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if Dr is negative
7^-x - 7 < 0
7^-x < 7¹

-x < 1
x > -1

last minnow
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in the 2nd last step?

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instead of -x < 1 should it be
-x > 1 since its a decreasing function

primal elm
last minnow
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goodness am I even making sense I don't even know what I'm saying

primal elm
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If you're tired, that's alright

last minnow
last minnow
last minnow
primal elm
last minnow
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hah

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let me do it again

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oh yeah it's the same as the previous inequality

last minnow
# primal elm Yes

thank you man I couldn't think straight after I don't know I lost count of how many hours I'm studying I was so confused about this.. thanks for helping

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+close

fast monolithBOT
# last minnow +close
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# fast monolith

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