Recent content by zebra1707

Thank you Mentallic, greatly appreciated.

This is still confusing me.. The equation represents the difference quotient f(2+h)− f(2) /h it represents the slope of the secant line through the points (2, f (2)) and (2+h, f(2+h)) on the curve. But i used this equation to find the DQ = -h+1 in the first place - feels like I am going...

Thank you Ray, I am a mature age student trying to nut things out for myself, I don't always have access to teachers, tutors etc - so its a challenge most of the time. I appreciate the response. Regards

Ray I appreciate your comments. However your reply is bordering on "well aren't you an idiot" I have used this forum for a few years now, and never once have I received a reply like this. Not everyone fully understands calculus as you do - Just a simple " did you realize that you have...

Hi TT, that's where I am stuck, I am not sure as to the next step. Can I assume that the answer to the previous question is correct?

Homework Statement Original function f(x) = -x^2+5x-2 I have calculated the difference quotient as -2x-h+5 Then use difference quotient to calculate the average rate of change: for the following x=2 and x=2+h I need this to go on to the next part of the question and i wanted to ensure...

Many thanks, I appreciate the guidance.

Thank you, yes, you are right. I think just a lack of confidence in this aspect of Maths. Sorry to be a bother. Regards

Thank you for your assistance.

Homework Statement Hi there I need assistance with two graphs that are causing me some problems y=e(^-2x)(-1) and y=ln(x-2)+1 Homework Equations I just need some guidence as to where to start - starting with a table - what range is approriate? The Attempt at a Solution Stuck

Hi there Can someone please review my work and advise. Homework Statement Given log(a)b=3 , use the properties of logs to evaluate 4log(a)(1/b)+2log(a)b^3 Homework Equations I used the rules log(a)1 = 0 log(a)(x/y) = log(a)x-log(a)y log(a)x^m = mlog(a)x The...

Projectile motion - urgent help needed Homework Statement Target is projected at an an angle to the horizontal, initial speed 4 m/s, unknown angle and unknown distance to the target. Height of the target is 0.8m. Need to find the minimum angle. Homework Equations v= u+at v =...

I agree, it does making asking about the kinetic energy redundant - I think it is a typo.. Many thanks for all your help on this one.

The first question has the wavelength at 180 mm not nanometers. Convert that to meters is 0.18 m. Cheers

Homework Statement Hi there. I have two questions and in both I believe that no photoelectrons will be emitted from the surface. Question 1 A metal with a work function of 9 x 10^-19 J is irradiated with UV radiation of wavelength 180 mm. Will photoelectrons be emitted from the...