Sb Sangpi
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 Oct 2 comment Counting Methods? Yea.I don't know about "n choose k". Can you please elaborate more? I appreciate it. Sorry for my lack knowledge. Oct 2 comment Counting Methods? 1) 2 ways to choose- because there is only 11, so if you choose 2 times it is 10. Do you mean like this? thx Sep 30 comment equation of the tangent to the following curves? sorry! how do you get $y=-4x-(-4)(-1)+8$ ? Sep 30 comment equation of the tangent to the following curves? fantastic answer! Thanks alot. Sorry for my bad question. Now I fully understood~ thx @AméricoTavares Sep 29 comment equation of the tangent to the following curves? 1. $2x-2$ but i don't know 2? Sep 29 comment equation of the tangent to the following curves? can you please explain in a step? thx~ @J.M. Sep 29 comment differentiation of Polynomials thx! for that @ArturoMagidin I will not use next time! Sep 29 comment differentiation of Polynomials ok! I understood now
$2x^3-4x$
$= 6x^2-4$ Sep 29 comment differentiation of Polynomials but the answer is $6x^3-4$ Sep 29 comment differentiation of Polynomials but the answer is 6x^3-4 Sep 29 comment differentiation of Polynomials but the answer is 6x^3-4 Sep 29 comment differentiation of Polynomials ok! I get it~ thx Sep 29 comment differentiation of Polynomials can you explain more by step how do you get 2x^3-4x^2 Aug 26 comment Equation of the tangents step by step great help! looking forward more help! thx alot Tavares. God bless you! ;) Aug 26 comment Equation of the tangents great! I like it! Thx alot Ross. I'm very happy! God bless you all! ;) Aug 25 comment Equation of the tangents aww..ok. so it is like this y=3x^3-1-12x^2-1+12x+2 ? thx Aug 25 comment Equation of the tangents there is no given (x,y) so how can i do? Aug 25 comment Application of differentiation of Polynomials? thx for that! appreciate it! ;) Aug 25 comment Application of differentiation of Polynomials? aww..i see now..thx for that! Aug 25 comment Application of differentiation of Polynomials? thx for that, I can't vote sorry..my point very low!