True or False

**rcs** · August 3rd 2012, 08:37 AM

i have here ten true or false problems and answers:
1. false because it is 16
2. true because sq root of 1 - 1 is 0... ( not too sure)
3. true because it is 1 after substituting 2 in the place of x
4. false because it is 81. ( not too sure)
5. false because the line should be 2x + 3y - 13 = 0
6. true does not exist
7. false because the interval should [0,1) and it is discontinuous ( not too sure)
8. false because it is indeterminate
9. false because it does exist to 2/3 ...
10. false because h(x) does not exist.

Guys hope im doing right here.... pls check my work. because i cannot tell these are sure answers.

Thanks

**ebaines** · August 3rd 2012, 11:03 AM

I think you have them right, except for (1) - the answer is correct (false) but the limit is not 16.

**rcs** · August 3rd 2012, 09:15 PM

what is the answer in the number 1 sir?

**skeeter** · August 4th 2012, 05:18 AM

$\lim_{x \to -2} \frac{x^4-16}{x+2} =$

$\lim_{x \to -2} \frac{(x+2)(x-2)(x^2+4)}{x+2} =$

$\lim_{x \to -2} (x-2)(x^2+4) = ?$

**rcs** · August 4th 2012, 04:15 PM

- 16 .. thanks

**emakarov** · August 4th 2012, 04:35 PM

Originally Posted by rcs

- 16 .. thanks

Think again.

**rcs** · August 5th 2012, 08:55 AM

(-2 - 2) (-2^2 + 4)
( -4 ) ( 4 + 4)
(-4) (8) = - 32 hmmm

i always get wrong ... if i dont have to recalculate it over and over

but it is ok... thank you guys for giving me hits and if not solve them entirely the problems

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