i think i got thatsmozdaddy said:i got 5ln5 - 4 i believe in the end.
truth.smozdaddy said:i got 5ln5 - 4 i believe in the end.
i used that method to check, but i used the 2unit one to do itcond42 said:hmm i didnt do it the way most people did.
I used the fact that if you differentiate (x-2)ln(x-2) then u get ln(x-2) + 1, then did integral from 3 to 7 of ln(x-2) + 1 minus integral from 3 to 7 of 1, using (x-2)ln(x-2) as the primitive of ln(x-2) + 1. I still got 5ln5 - 4, so would this be a justifiable method(seems i still found the area, what the question asked), and do u think i would get 5/5 (or what would i get?).
samesmozdaddy said:i got 5ln5 - 4 i believe in the end.
yeah you seem to have done the same as me, this is a correct method to use isnt it?...it would be kinda stupid if it wasnt but u never know...do u reckon we get 5/5?betraya said:I did it by knowing the integral of lnx = xlnx-x and thus getting 5ln5 -4
LOLstormz89 said:I completely forgot how to integrate lnx
I stared at it for like 15mins not knowing what to do. So I gave up and wrote this.
Loge(x-2) told me it didn't wanted to be integrated when it was 3, we grew up together. Now it went to college, doesn't call me anymore. What a jerk.
And just left the exam room (in the proper way after checking my previous answers)
Do you mean x = e^y + 2?zvyx said:Rarely do you see 5 markers.. so I was put off by that in the reading time..
Then I looked at the question briefly, thought it was piece of cake. "5 marks woo" I thought.
45 min to go, I reach question 10, look at it and think "wtf integrating lnx?"
but yeh. I reflected the graph along y=x, thus giving y = e^x + 2, and did the area of rectangle etc stuff. 5ln5 - 4 all the way![]()
I did also. Completely blanked out. Left it, did part b) then came back and was like "Ah, Mr Curran's magical method of magic!" and did the rectangle - the curve.stormz89 said:I completely forgot how to integrate lnx
I stared at it for like 15mins not knowing what to do. So I gave up and wrote this.
Loge(x-2) told me it didn't wanted to be integrated when it was 3, we grew up together. Now it went to college, doesn't call me anymore. What a jerk.
And just left the exam room (in the proper way after checking my previous answers)