# NUMERICAL METHODS (mei ocr) - HELP IF YOU CAN!Watch

#1
Jan 2010 paper:

(Q3) Given that f(x)=x^3-x^2+1, find f(0.5).

Use the forumla f(x+h)≈f(x)+hf '(x) to show that

f(0.5+h)≈0.875-0.25h

hence determine the approximate range of values of x for which f(x)=0.875 correct to 3 decimal places.

Also,

Q7)

Show that the equation x = 3 sin x can be rearranged into the form

x = sin x + 2/3 x

If you have sufficient knowledge on numerical methods, and you know how to do these questions then please help! Much appreciated! thanks
0
8 years ago
#2
3. To find f(0.5) sub 0.5 for x, you should end up with 0.875
differentiate f(x) to find f'(x) then use it in the formula f(x+h)is about = f(x)+hf'(x) and you should get the answer given

7. first divide both sides by 3 you end up with (x/3)=sinx
another way of writing (x/3) is x-(2/3)x so add (2/3)x to both sides
0
X

new posts

Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• University of East Anglia
All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
Wed, 30 Jan '19
• Solent University
Sat, 2 Feb '19
• Sheffield Hallam University
Sun, 3 Feb '19

### Poll

Join the discussion

#### The new Gillette ad. Is it:

Man-hating bullsh*t (152)
45.51%
Pro-humanity (182)
54.49%