find area

anyone finding the area....pls upload a graph too...

14 Answers

1
Arshad ~Died~ ·

ne one?

1
injun joe ·

See, using the property of mod, we can say that the graph changes its concavity at x=-1/2 in the max function and x= 1/2 in the min function.
to find area, break the limits at these points. And the graph will be that of x2+x and x2-x in the respective interval.

24
eureka123 ·

IS it that easy ?
I dont think so...

1
injun joe ·

I dunno. I'm still trying. Just said what crossed my mind at the first glance.

1
injun joe ·

err...I made a mistake

1
Arshad ~Died~ ·

if it would have had been that simple i wouldnt have uploaded it...

1
Arshad ~Died~ ·

anyone pls try.....
i think its a really good question....

24
eureka123 ·

Surely its a very good question..
but I am struck in the middle of ques....
Maybe Nishant sir or Anant sir can help u out in a better way

1
Arshad ~Died~ ·

anant sir....nishant sir pls help me out.........

1
Philip Calvert ·

hey arshad why there is only one function inside max and min

1
Arshad ~Died~ ·

there is only one function but check the limits...the limits are diff.

1
Arshad ~Died~ ·


i am getting graph of g(x) as above........pls verify

24
eureka123 ·

I ma getting g(x) as ..

Plzz tell if its correct or not...I need some expert's opinion

66
kaymant ·

Eureka, your g(x) is not correct.
You see, that for -2 ≤ x < 0, g(x) is same as max f(t) for -2 ≤ t ≤ x. Notice that for t < 0, f(t) is an upward opening parabola having roots at t = -1 and 0. So the maximum of f(t) always occurs at t = -2. So g(x) = 2 for -2 ≤ x < 0.

Once you go to the positive side, f(t) is an upward opening parabola with roots at t =0, 1. So g(x) = f (x) as long as 0 ≤ x ≤ 1/2, after which the minimum is at x=1/2. So g(x) gets latched to f(1/2). As such

g(x) = 2 for -2 ≤ x < 0
= x2 - x for 0 ≤ x ≤ 1/2
= -1/4 for 1/2 < x ≤ 3

So the required area = 113/24 sq units

Your Answer

Close [X]