Question

Find the domain of f(x)= 2/(x-3)-5

Answer 1

all real nos. except 3

Answer 2

all real number except 3 and 8

Answer 3

How do I know for sure though? Like why is the answer "all real numbers except 3 and 8"?

Answer 4

denominator can be equal to 0. only for those x values for which denominator is zero will not be included in the domain..

Answer 5

@iceywheniplease7 thanks for medal...

Answer 6

You're welcome thank you for explaining it to me and helping me out!

Answer 7

all are welcome.... see you @iceywheniplease7 .....

Answer 8

the way of this problem was written...number 5 is a separate constant, it's not in the denominator, so number 8 is wrong...it's only number 3 that x cannot be

Answer 9

if 5 is also part of denominator then 8 will be included otherwise it will not...... from the given problem it looks like 5 is part of denominator....

Answer 10

5 is not apart of it.

Answer 11

no @jatinbansalhot, if 5 is in the denominator ..then you can rewrite that expression as :

f(x) = 2/(x-8) ...and hence ...8 is the only answer..so either way, answer of both 3 and 8 is wrong..

Answer 12

icey, look at matricked answer..only 3 is not in the domain

Answer 13

@tamtoan we can simplify the expression but we can't change the original domain... do you know about limit... then you can understand me..

Answer 14

@tamtoan .... maybe i'm not the correct.... confirm and tell @iceywheniplease7

Answer 15

@jatinbansalhot , this is just a simple algebra funtion, and by the way, i do know limit :)...try to read the problem again..and icey already said 5 is not a part of it :)

Answer 16

Yes. So thank you for bringing this to our attnetion Tamtoan :)

Answer 17

np, icey and jatinbansalhot :), we are all human..we do make mistakes sometimes, hope you get it straight, and jatinbansalhot explanation of denominator cannot be zero is excellent. , have a good time to both