Maths Edexcel C12 IAL May 24 2017 Markscheme

OP

Guys I got 2020 for finding the sum of arithmetic sequence that was the first question and what did you guys do to find area under graph ? What I did was find the area of the curve then first the area of the small triangle and add them together

Reply 21

Luj99

OP

12

For the log question part 2 I remember getting "xxxxx"=10^0 , the 10^0 was all I remembered from log question. How bout you guys ?

Reply 22

Luj99

OP

12

Original post by mayank.2592

yes I did the same :smile:

Guys for the first part of that graph question the scale factor was 4 right ? I remember the question was f(1/4x)

Reply 23

kromekaramel

11

Original post by raima567

Since it said, both circles touch the circle, one circle touches A and another circle touches B
A(1,4)
B(7,8)
and we know the centre for both (0,0)
so one radius is (1^2 + 4 ^2) = 17^1/2
and another radius is (7^2 + 8^2) = 113^1/2

It doesn't touch it at A and B because each circle would intersect C1 at more than one point

Reply 24

Luj99

OP

12

Original post by kromekaramel

It doesn't touch it at A and B because each circle would intersect C1 at more than one point

So what's the method to solve it ?

Reply 25

raima567

7

Original post by kromekaramel

It doesn't touch it at A and B because each circle would intersect C1 at more than one point

Then are the radii (13)^1/2 and 13(13)^1/2 ?

Reply 26

mohammedbydoon

9

what would the A be out f ?

Reply 27

mohammedbydoon

9

what would the A be out of 125?

Reply 28

octoberrain

17

Original post by raima567

Since it said, both circles touch the circle, one circle touches A and another circle touches B
A(1,4)
B(7,8)
and we know the centre for both (0,0)
so one radius is (1^2 + 4 ^2) = 17^1/2
and another radius is (7^2 + 8^2) = 113^1/2