P P.T.F.E Member Joined Nov 6, 2008 Messages 333 Gender Male HSC 2013 May 19, 2009 #1 the tangent of y=log10x at the point of intersection witht the x aixs
lyounamu Reborn Joined Oct 28, 2007 Messages 9,998 Gender Male HSC N/A May 19, 2009 #2 P.T.F.E said: the tangent of y=log10x at the point of intersection witht the x aixs Click to expand... intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy
P.T.F.E said: the tangent of y=log10x at the point of intersection witht the x aixs Click to expand... intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy
D Drongoski Well-Known Member Joined Feb 22, 2009 Messages 4,255 Gender Male HSC N/A May 19, 2009 #3 lyounamu said: intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy Click to expand... lyounamu An-nyeong-ha-se-yo welcome back ! Last edited: May 20, 2009
lyounamu said: intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy Click to expand... lyounamu An-nyeong-ha-se-yo welcome back !
P P.T.F.E Member Joined Nov 6, 2008 Messages 333 Gender Male HSC 2013 May 19, 2009 #4 lyounamu said: intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy Click to expand... yer thats what i have it was the In10 in the tanget that was confused me because it didnt seem to fit in par b. thanks anyway.
lyounamu said: intersects x-axis when y = 0 so it intersects it at (1,0) y = lnx/ln10 dy/dx = 1/xln10 when x = 1, dy/dx = 1/ln10 rest should be easy Click to expand... yer thats what i have it was the In10 in the tanget that was confused me because it didnt seem to fit in par b. thanks anyway.