## Question

secondary 4 | A Maths

Anyone can contribute an answer, even non-tutors.

##### Putin

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ii, iii, iv. I don’t get the concept behind it. (I know min and max value but idk how to apply it for those 3 parts) tyty

Date Posted: 5 months ago
Views: 36

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1st
Date Posted: 5 months ago
Putin
5 months ago
Hi tq for replying. For iii how did u get 0 squared tho?
5 months ago
You knew that when it comes to r-formula concepts,there are two r values (maximum and minimum) of which you denote a negative sign for the minimum and positive sign for the maximum...In this case,the minimum doesn't make a difference as it is still positive the moment you squared it...Well,the qns ask for a maximum..so the nearest r value is 0..Hope this answer your qn...
Putin
5 months ago
@mathaddict100 oh I see. So if they ask for 1/42+ (r etc)^3 the max value then it wldnt be 0 right. Sry if the qns is a bit stupid I js wna confirm.
Snell
5 months ago
hi,
can u post the qn again?
i can ans :)
Putin
5 months ago
@snell okay
5 months ago
Yes..Good Job!.. :) You can see it now...it depends on the power...Notice that even powers gives of a positive sign while odd powers still gives a negative sign.If it is cubic,it will be negative so the overall value will be maximum..It's ok to ask any foolish qn..You're learning..Its better to understand rather than not ask anything at all and keep making mistakes.. :)
Putin
5 months ago