question on equations with powers

Original post by plaguarist

Thanks, have another Q, how do i rearrange N = Ac^t to make T the subject?

Reply 3

Original post by SunDun111

Thanks, have another Q, how do i rearrange N = Ac^t to make T the subject?

Take logs.

Reply 4

Original post by SunDun111

Thanks, have another Q, how do i rearrange N = Ac^t to make T the subject?

What level/year you at/in?

Reply 5

Original post by britishtf2

What level/year you at/in?

A level, but am working on improving basic maths at the minute, it cost me a A last year

Reply 6

Original post by SunDun111

A level, but am working on improving basic maths at the minute, it cost me a A last year

Ah cool.

Use logs.

(edited 7 years ago)

Reply 7

Original post by britishtf2

Ah cool.

N = AC^T
log(N) = log(AC^T)
log(N) = T*log(AC)
T = log(N)/[log(AC)]

Full solutions are against forum guidelines.

Reply 8

Original post by Zacken

Full solutions are against forum guidelines.

Did not know that - thanks for the heads up.

Reply 9

Et Tu, Brute?

Original post by SunDun111

A level, but am working on improving basic maths at the minute, it cost me a A last year

I couldn't recommend khan academy more, it is really good for the basics. It even goes well beyond that also, I used it this year for vector calculus, had I found out the did those kind of topics sooner I might have done a hell of a lot better!

Reply 10

Original post by britishtf2

Did not know that - thanks for the heads up.

There's a short posting guide at the top of the maths forum in red, might want to have a quick look at it. :smile:

Reply 11

Original post by britishtf2

Ah cool.

N = AC^T
log(N) = log(AC^T)
log(N) = T*log(AC)
T = log(N)/[log(AC)]

got that too straight away, was confused cause answer is 1/c multiplied by ln (n/a) = T

Reply 12

Original post by Zacken

There's a short posting guide at the top of the maths forum in red, might want to have a quick look at it. :smile:

Cheers

Reply 13

Original post by Zacken

There's a short posting guide at the top of the maths forum in red, might want to have a quick look at it. :smile:

I will post that M1 question today, that i got stuck on from a few days, think I explained the Q wrong.

Reply 14

Original post by SunDun111

got that too straight away, was confused cause answer is 1/c multiplied by ln (n/a) = T

Because that's the correct answer. The ^t is only on the C.

So log(AC^T) =/= T log (AC).

Reply 15

Original post by SunDun111

got that too straight away, was confused cause answer is 1/c multiplied by ln (n/a) = T

Actually, first line is as such:
N/A = C^T

Go from there.
Realised not all of the RHS is not ^T.

Reply 16

Original post by Zacken

Because that's the correct answer. The ^t is only on the C.

So log(AC^T) =/= T log (AC).

wouldnt you take log to the n thoguh as well, so it would be Log N / Log AC

Reply 17

Original post by britishtf2

Actually, first line is as such:
N/A = C^T

Go from there.
Realised not all of the RHS is not ^T.

Original post by Zacken

Because that's the correct answer. The ^t is only on the C.

So log(AC^T) =/= T log (AC).

Dm i figured it out, simply overcomplicated the question

Reply 18

Original post by Zacken

Because that's the correct answer. The ^t is only on the C.

So log(AC^T) =/= T log (AC).

Realised that as I read it again - I shouldn't within 20 mins of getting up xd

Reply 19