maths doubts

[Ghost Of Highbury]

no dude i know that im talking about when finding x1 the derivate of x^3 = 3x^2, read my post carefully again ull see what i mean and can u please post the link for the calculators also, i think theres been a substitution error been made just clarifying though it cud just be a mistake

https://studentforums.biz/index.php/topic,4171.0.html

[@d!_†oX!©]

cool dude...can u get it printed by monday???

[astarmathsandphysics]

The number of sf is said in the question. Carry out the calulation until two answers agree to that number of sf.. In the question above you would stop at x_4 (though this gives the wrong answer)