Question

Find the limit of the function by using direct substitution.

limit as x approaches zero of (x^2 + 5)

Answer 1

just substitute x = 0 and you have the limit as x -> 0

Answer 2

so 5?

Answer 3

yep

Answer 4

can you help me with one more?

Answer 5

fire away

Answer 6

Find the limit of the function algebraically.

limit as x approaches four of quantity x squared minus sixteen divided by quantity x minus four.

Answer 7

I think it's 8 but I'm not sure

Answer 8

note if you plug in x = 4 you get 0/0

Answer 9

so no limit?

Answer 10

oh you can divide of course Silly me
dividing gives x + 4

Answer 11

so it is 8?

Answer 12

@welshfella

Answer 13

yes i would say so
limits are not my strong point though

just a sec

Answer 14

okay

Answer 15

yes 8 it is

Answer 16

limit as x approaches 4 of (x^2 - 16)/ (x - 4)

Answer 17

http://www.wolframalpha.com/input/?i=limit+as+x+approaches+4+of+%28x%5E2+-+16%29%2F+%28x+-+4%29

Answer 18

Yay! thank you

Answer 19

the above link confirms it