LOGARITHMS homework help
((edited 9 years ago)
Original post by kandykissesxox
can somebody please help me to understand questions f-j? I'm frustrated on log, and I'm unsure on how to punch the numbers into the calculator. please help (
(Did you manage to do part (e)? Part (f) uses exactly the same principles of taking logs and solving a linear equation for x.
Original post by kandykissesxox
..
Have you attempted the question by any chance? If so can you show your workings
Original post by Sena5
F)
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
This is complete nonsense.
Original post by Sena5
g) use power law
then you should each until here-->
(x-1) = log 3
(x+1) log 8
solve and simply from there
to get x = 3.24..
then you should each until here-->
(x-1) = log 3
(x+1) log 8
solve and simply from there
to get x = 3.24..
This is totally wrong again.
(edited 9 years ago)
Original post by Sena5
F)
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
Are you trolling the Maths forum now, because this is the second pile of rubbish you've posted in a thread in the last 24 hours!
(And in any case, it is against forum rules to post full solutions!)
Original post by Sena5
F)
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
log 7^(2x-1) = log 23
log (2x-1) = 1.36...
log 7
log (2x-1) = 1.36.. * (log 7)
log 2x-1 = 1.15...
log 2x = 2.15...
10^(2.15..) = x
2
:. x = 70.75...
lmao u wot?
log7^(2x-1) = log23
(2x-1)log7 = log23
(2x-1) = log23/log7
etc.
Type the logarithm power rule in to Google.
(edited 9 years ago)
Quick Reply
Related discussions
- Hopefully I will cry tears of joy
- A Level maths
- Do you use logarithms, matrices and exponentials in algorithms?
- AS logs help
- How mathematical is business economics course?
- What youtubers or websites are great to start learning logoithmic functions? Maths
- Math help - Logarthmic functions
- Physics A-Level
- live, laugh, love (and sometimes cry) - a blog <3
- a level math logs question
- Maths help
- Econ help - Finding the market Equilibrium
- Chemistry students help meeee
- A Level OCR Pure Maths Question HELP
- Bristol Maths Test for Engineering Courses
- logbase e or logbase 10?
- -1^x = b is this solveable using natural logarithms?
- Lse Economics and Economic history…help please
- My grow your grades journal 🎀 ~ as a year 12
- Further Pure Mathematics and Further Maths GCSE?
Latest
Trending
Last reply 3 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 3 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
