Integration by Substitution ?? (1 Viewer)

[accio.brain]

Will they always give you the substitution to use for integrating?
I thought they did, but the 2008 3U HSC (Q1e) expects you to make it up yourself...

 

[Uncle]

They do in Mathematics Extension 1 but not in Mathematics Extension 2.
Or you can just integrate by inspection if you are capable of doing so.

 

[Xcelz]

Will they always give you the substitution to use for integrating?
I thought they did, but the 2008 3U HSC (Q1e) expects you to make it up yourself...

they will 99% of the time give it. but if they don't i think it is relatively easy to choose what you should be substituting for.

 

[untouchablecuz]

from what i have encountered, they will usually ask trigonometric integrals without providing a suitable substitution

such as or

 

[scardizzle]

just checked the 2008 HSC, the question doesnt require you to use substitution. Although using substitution helps you see it better. You need to use the reverse chain rule:

Intergral of f'(x).f(x)^n = f(x)^n+1/n+1 +c

 

[accio.brain]

Thanks all