Thread: Prove limit with epsilon-delta definition.

lim x -> 2 sqrt.(4x + 5 ) = sqrt.(13)

i have trouble proving limits with radicals. can anyone please explain clearly the steps?


i know at one point delta = d = min{1, e/8}

i have no idea what that means. and how to use it for the final answer.

Originally Posted by NeedHelp18

lim x -> 2 sqrt.(4x + 5 ) = sqrt.(13)

i have trouble proving limits with radicals. can anyone please explain clearly the steps?


i know at one point delta = d = min{1, e/8}

i have no idea what that means. and how to use it for the final answer.

http://www.mathhelpforum.com/math-he...ta-proofs.html

i read that. but it didnt show anything with radicals.

can someone explain how to do the problem i posted? thank you.

Go to this website Wolfram|Alpha
In the input window, type in this exact expression: limit sqrt[4x+5] as x to 2 (you can copy & paste)
Click the equals bar at the right-hand end of the input window.
Be sure you click ‘show steps’ to see the solution.