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Log and exponential functions? a level maths

https://gyazo.com/4f80706b6822be63b3ab9821e5cfa131

Some guidance on how to approach this question pls.
Haven't being taught A level yet So i would appreciate some help.
I've done some simple log questions already but no idea how to do this one.
replace y and x with the coordinates of the two points to get two equations with A and p.

then you can eliminate A by dividing on equation by the other.

make p the subject using logarithms.

once you have p go back and find A from one of the two equations above.
Reply 2
Avatar for Jian17
Jian17
OP
10
Original post by the bear
replace y and x with the coordinates of the two points to get two equations with A and p.

then you can eliminate A by dividing on equation by the other.

make p the subject using logarithms.

once you have p go back and find A from one of the two equations above.


I end up with (ln2.92 / 4Pln) = (ln1.60 / Pln)
I can provide a photo of my working out too if needed.
so you get

2.92 = Ae4p

1.60 = Aep

divide....

2.92/1.60 = e4p/ep

can you continue ?
Reply 4
Avatar for Jian17
Jian17
OP
10
Original post by the bear
so you get

2.92 = Ae4p

1.60 = Aep

divide....

2.92/1.60 = e4p/ep

can you continue ?


How do you get from those two separate equations to 2.92/1.60 = e4p/ep

Don't you need to make A the subject and then you get
2.92/ e4p = 1.60 / ep
Original post by Jian17
How do you get from those two separate equations to 2.92/1.60 = e4p/ep

Don't you need to make A the subject and then you get
2.92/ e4p = 1.60 / ep


no you don't need to, but you can if you like.

i just divided the LH sides and the RH sides.... the As cancel out.

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