Question 6 Practice Paper 3 CORE 2 A AS Maths

[timothypjohnson]

Good, but would be even more useful if the more direct alternative method had also been shown and compared to the method used here.

In the alternative method, there's no need to calculate the trapezium area at all. One simply subtracts the terms of the curve function from those of the line function (which gives -x^2 -3x + 4) and then calculates the definite integral of this between the same x values used in the method shown (-4 and 1). Job done.

[kundoro]

minus!!!

[sbtccc]

A long way round the problem. Usual poor teaching.

[IAMJWB]

@sbtccc how is that a long way around the problem?

[Jamesdude460]

At about 7.00. How does the '-' (minus sign) after the 45 change the brackets being taken away from eachother, to being added to eachother?

[mathstutorbiz]

erm, rather difficult to explain in words, may I suggest rerunning the video and have another listen. mathstutor

[mathstutorbiz]

erm, rather difficult to explain in words, may I suggest rerunning the video and have another listen. mathstutor

[Yu2Kal]

Because its minus the whole thing the thing is normally ( something ) - ( something else )

since theres a minus it becomes - something - - something else

which is - something + something

[mathstutorbiz]

It appears that "just over" 10 mins uploads... sometimes. Don't know why, but it does, sometimes.

[MathMikie]

how did you upload this i thought they had a limit of 10 minutes