# AQA core 3 2019Watch

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#1
Did anyone else get two maximum value for the 2nd derivative question?
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5 days ago
#2
Did anyone else get two maximum value for the 2nd derivative question?
i got 2 min as d2y/dx2 was greater than 0
Last edited by AldiiblA; 5 days ago
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#3
I got like -2, and -0.5. it can't have been minimum because the entire numerator was negative and the denominator was positive since it was squared. I checked it 4\5 times over.
(Original post by AldiiblA)
i got 2 min as d2y/dx2 was greater than 0
0
5 days ago
#4
I got like -2, and -0.5. it can't have been minimum because the entire numerator was negative and the denominator was positive since it was squared. I checked it 4\5 times over.
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#5
Yes.
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5 days ago
#6
Did anyone else get two maximum value for the 2nd derivative question?
Looks like there’s one question we didn’t both get right 😬 I got a maximum and a minimum. What were the values you subbed in?
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5 days ago
#7
4 and 1 or something like that
(Original post by Connor09)
Looks like there’s one question we didn’t both get right 😬 I got a maximum and a minimum. What were the values you subbed in?
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5 days ago
#8
(Original post by AldiiblA)
4 and 1 or something like that
Same here, it was a pretty fiddly second derivative so I may have made a mistake.
0
5 days ago
#9
same bro may be a miniscule minus sign

(Original post by Connor09)
Same here, it was a pretty fiddly second derivative so I may have made a mistake.
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5 days ago
#10
I got x = 4 and x = 1 too; one of them I got to be maximum (can't remember which), the other minimum
(Original post by AldiiblA)
4 and 1 or something like that
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5 days ago
#11
(Original post by sarahdlondon)
I got x = 4 and x = 1 too; one of them I got to be maximum (can't remember which), the other minimum
Ahh that’s good
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5 days ago
#12
well i think if the sign error is there for the differential you may well get 2 - 3 marks may be defo 2 imo
(Original post by sarahdlondon)
I got x = 4 and x = 1 too; one of them I got to be maximum (can't remember which), the other minimum
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#13
There might have been a maximum and one minimum. But either way if you work it out that far you would get at least 3 marks
1
5 days ago
#14
Do you think the paper was overall easier / the same / more difficult than last year's. I thought it was pretty similar, but last year I was too slow so lost marks for questions that I could have done with another 5 minutes...
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5 days ago
#15
Defo harder than last year and 2017 imo as the 7 marker and complex 2nd derivative etc; a solid 13-18 marks were solid topics
(Original post by sarahdlondon)
Do you think the paper was overall easier / the same / more difficult than last year's. I thought it was pretty similar, but last year I was too slow so lost marks for questions that I could have done with another 5 minutes...
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5 days ago
#16
I guess it depends on how people fared with that last question. I would anticipate an A* boundary level around 65 (like last year's). The first five questions were relatively straightforward, and in my opinion maybe even easier than the two previous years' papers. Q8 was certainly a question where some marks will have been dropped.
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5 days ago
#17
I got x=4 and x=1 too but when subbed into my second derivative got one minimum point one and one maximum point
1
5 days ago
#18
(Original post by Sierra-)
I got x=4 and x=1 too but when subbed into my second derivative got one minimum point one and one maximum point
1/4ln9 rings a bell?
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5 days ago
#19
Yes!! Deffo got that somewhere
1/4ln9 rings a bell?
0
4 days ago
#20
(Original post by Sierra-)
Yes!! Deffo got that somewhere
Yeah I remember getting that for something
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