Quick Integration? (1 Viewer)

[Zokunu]

(b) Find the area of the shaded region OABC? <-

Thanks

 

[andybandy]

its the answer 7.5 units^2 ?

 

[Zokunu]

its the answer 7.5 units^2 ?

is the answer 7.5 units^2....uh no. I checked and it's supposed to be 6 units^2.

Littlehelp?

 

[Parvee]

 

[Menomaths]

Got it, posting solution.
Edit:beaten
Edit2: Parvee's solution except it should be + integral of 4-x bounded by 5 to 4 as area cannot be negative

 

[RealiseNothing]

Got it, posting solution.
Edit:beaten
Edit2: Parvee's solution except it should be + integral of 4-x bounded by 5 to 4 as area cannot be negative

No Parvee is right.

 

[Menomaths]

No Parvee is right.

But when you add it comes to 5?

Sorry using fx 82ms :[ just did it with 991es and Parvee is correct

Need to smuggle my 991es into exam hall

 

[Zokunu]

mhm ok. Anyways, TY ALL

 

[SharkeyBoy]

But doesn't that mean the answer is 7, not 6??

 

[Menomaths]

But doesn't that mean the answer is 7, not 6??

It's 6 when you add it up. integral of 4-x bounded by 5 and 4 is -1/2 so when you minus it, it adds on instead.

 

[SharkeyBoy]

It's 6 when you add it up. integral of 4-x bounded by 5 and 4 is -1/2 so when you minus it, it adds on instead.

oh wait, i had an adding up error, for the second bit i thought 8 - 3.5 = 5.5 sorry... *facepalm*

 

[Menomaths]

oh wait, i had an adding up error, for the second bit i thought 8 - 3.5 = 5.5 sorry... *facepalm*

Don't worry, you're not the only one that has facepalm moments lol