#1
lkhkn
2 years ago
#2

Posted from TSR Mobile
0
2 years ago
#3
(Original post by Sam00)
find 'a' if 'log(base a) = 3/2'

I am really stuck
0
2 years ago
#4
0
2 years ago
#5
4 to the power of 3/2 = 8

Posted from TSR Mobile
0
2 years ago
#6
(Original post by Sam00)
Sorry I don't understand what you mean

The question I am revising is:

log(base a) of 8 = 3/2 (or 1.5)

An I need to find the value of a
ok so this is what you have right now

0
2 years ago
#7
(Original post by Truthseeker3)
a=4

Posted from TSR Mobile
(Original post by Truthseeker3)
4 to the power of 3/2 = 8

Posted from TSR Mobile
hey! we're supposed to help the arrive at the answer not just give them the answer >.>
0
2 years ago
#8
Sam should know that rule thefatone, if he has learned logs

Posted from TSR Mobile
0
2 years ago
#9
(Original post by Truthseeker3)
a=4

Posted from TSR Mobile
(Original post by Truthseeker3)
4 to the power of 3/2 = 8

Posted from TSR Mobile
Full solutions are against TSR rules.
0
2 years ago
#10
We don't need to baby step anyone. People should struggle and learn it, it's not that hard, anyone can do it, he needs to go and learn logs then..

Posted from TSR Mobile
0
2 years ago
#11
They're against the rules? Oh didn't know

Posted from TSR Mobile
0
2 years ago
#12
(Original post by Sam00)
So would I then have to root each side to get the value of a?
no you have to cube root first the square
0
2 years ago
#13
(Original post by undercxver)
Full solutions are against TSR rules.
(Original post by Truthseeker3)
We don't need to baby step anyone. People should struggle and learn it, it's not that hard, anyone can do it, he needs to go and learn logs then..

Posted from TSR Mobile
(Original post by Truthseeker3)
They're against the rules? Oh didn't know

Posted from TSR Mobile
now you know ^-^
1
2 years ago
#14
(Original post by Sam00)
so if a^3/2 = 8

would I do 3/2√8 = a?

therefore 3/2√8 = 4?
You might wanna watch this video for some help on Logarithms.
0
2 years ago
#15
(Original post by Sam00)
so if a^3/2 = 8

would I do 3/2√8 = a?

therefore 3/2√8 = 4?
You've got:

a3/2= 8

Do you agree that:

√(a3) = 8

Therefore square both sides:

a3 = 64

I hope you can get the last bit

edit: a3/2 = (a3)1/2 Hence I got root a
0
2 years ago
#16
(Original post by Sam00)
I have just watched the 2nd one and it makes sense that:

log(basea)x = p -----> a^p = x

therefore as I have log(basea)8 = 3/2 ------> a^3/2 = 8

I am not sure where to go from here as it doesn't explain

So

Eliminate the powers. Square both sides: .

Got it?
0
2 years ago
#17
(Original post by Sam00)
Ok so is a3/2= the same as √(a3) so the root side gets rid of the denominator in the power fraction?
As, rules of indices (or rules of order) says:

x1/2 = √x

x1/3 = 3√x

etc..

In your question I split the 3/2 into 3 x 1/2.
0
2 years ago
#18
(Original post by undercxver)
So

Eliminate the powers. Square both sides: .

Got it?
How do you get all those roots and stuff on here? This is the first time I've done maths on TSR and I've only found the x2 button and I really enjoy using it now ahahah!
0
2 years ago
#19
How do you get all those roots and stuff on here? This is the first time I've done maths on TSR and I've only found the x2 button and I'm really enjoy using it now ahahah!
Haha, this is called .

If you want help with this check out the help page.

It's fun but quite long quite to do for complicated maths.
0
2 years ago
#20
How do you get all those roots and stuff on here? This is the first time I've done maths on TSR and I've only found the x2 button and I really enjoy using it now ahahah!
Yup . If you're doing maths at uni you'll probably come across it so it's good practice to use it on here .
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