sums and differences of areas...help please :) (1 Viewer)

[minwoo]

hey
i was wondering if anyone could help me with the following question....thanks heaps....

*find the area enclosed betwen the curve y= x squared and the line
y= -6x + 16

 

[pLuvia]

First you find the intersections using simultaneous equations and you should end up with

x=2, -8 These will be the boundaries

2
∫ (-6x+16-x²) dx
-8

[ -3x²+16x-x³/3 ]²_-8
= 52/3 +448/3
= 166 ²/₃

 

[Riviet]

Since you're finding the enclosed area, don't forget to include units².

 

[sando]

Umm... just a question for pluvia or riviet cos u both used it:

how do u write X (squared).

do u need a special program for the powers cos i cant seem to find it on microsoft word

 

[pLuvia]

X²

X[ sup]2[/ sup]

Without the spaces [ sup] (what ever in here) [/sup ]

 

[Riviet]

You type {sup}your text here{/sup} but use square brackets, ie these [ ]

pLuvia- synchronised posting

 

[sando]

ok, thanks for that


but... do u know how to use it for microsoft word incase i want to type up my maths notes?

 

[Riviet]

You can copy and paste it from a bos post or any site that has the superscript or go to Insert>Symbol in MS word and search for the superscipt in the list.

 

[SoulSearcher]

You can also add the superscript button onto the MS word toolbar to put numbers in superscript quickly