Who here can do long hand square rooting?

[MikeMike]

because i saw my teacher do it for us and holy fvcking sh!t man he got 604.5(said the 5 was a basic estimate) and the calc said 604.501 he was given 7 random numbers by a student in our class

now that stuff is confusing

who here actually knows how to do it that way? please be truthful

 

[beer]

Newton-rhapson (sp?) method.

 

[her209]

Square root means taking a number and dividing it into n equal pieces of n units.

 

[bleeb]

i forgot how to do this stuff.... stuff i learned in kindergarden.

 

[MikeMike]

Originally posted by: Elemental007
Newton-rhapson (sp?) method.

i dont know what method, he is my chemistry teacher and we had like 5 extra minutes so he just did it

 

[beer]

Originally posted by: her209
Square root means taking a number and dividing it into n equal pieces of n units.

Which is much easier said than done for large numbers......im sure he knows what it is but the process of doing it for large numbers is complicated.

 

[bleeb]

Read This Foo

 

[gopunk]

i do now (thanks google)

 

[beer]

Originally posted by: bleeb
Read This Foo

inaccurate

From my calc II book

"Let R be a positive number. Approximations of sqrt[R] are generated by the sequence {An} defined recursively by:

A1 = 1, An = (1/2)(A(n-1) + (R/(A(n-1)) for n = {1, 2, 3, 4.....}


As a matter of fact in one of my microprocessor programming classes, simple CPUs without a sqrt instruction built into the ISA use this method to compute a sqrt. It's recurive though, so it's not overly efficient, but its the only way to be exact by hand.

 

[gopunk]

Originally posted by: Elemental007

Originally posted by: bleeb
Read This Foo

inaccurate

From my calc II book

"Let R be a positive number. Approximations of sqrt[R] are generated by the sequence {An} defined recursively by:

A1 = 1, An = (1/2)(A(n-1) + (R/(A(n-1)) for n = {1, 2, 3, 4.....}


As a matter of fact in one of my microprocessor programming classes, simple CPUs without a sqrt instruction built into the ISA use this method to compute a sqrt. It's recurive though, so it's not overly efficient, but its the only way to be exact by hand.

is it just me or is that the method described halfway down the page?

 

[Yomicron]

The Trachtenberg Speed System of Basic Mathematics

 

[MikeMike]

and his favorite movie is Pootie-Tang

 

[McPhreak]

Yeah. My housemate could take the square root of any number down to 3 decimal places within about 15-20 seconds in his head...


...great for parties I guess...