# Can some one please explain to me the following sum..Watch

#1
Hi im practising some differentiation questions but seem to be forgetting my basics.

Can someone please explain why 32^2/5 is equal to 4?

Thanks
0
8 years ago
#2
(Original post by amani-puresapphire)
Hi im practising some differentiation questions but seem to be forgetting my basics.

Can someone please explain why 32^2/5 is equal to 4?

Thanks
32^2/5 can also be read as: 32 x 32 to the fifth root i.e: (1024)^1/5. =} Is that differentiation? o.0
More of an indices.
ANyways to basic differentiation you do:
say for example you have 32x^3
That becomes: dy/dx: 96x^2.
You times the n power and subtract one from the power as well.
If not quote me back /
0
#3
(Original post by ibysaiyan)
32^2/5 can also be read as: 32 x 32 to the fifth root i.e: (1024)^1/5. =} Is that differentiation? o.0
More of an indices.
ANyways to basic differentiation you do:
say for example you have 32x^3
That becomes: dy/dx: 96x^2.
You times the n power and subtract one from the power as well.
If not quote me back /
Ahh sorry i didn't mean that in itself is differentiation. Its just part of a question. Im supposed to differentiate the next part and theres more to it. Anyway, thanks for that i understand the 1024^1/5 (32x32 is 1024 right?). How does this lead to 4 Meh i sound pretty stupid right now
0
8 years ago
#4
(Original post by ibysaiyan)
32^2/5 can also be read as: 32 x 32 to the fifth root i.e: (1024)^1/5. =} Is that differentiation? o.0
Why make it that hard? If the poster cant find the answer to this then knowing the 5th root of 1024 is going to be harder...

something x something x something x something x something = 32

thats what the denominator of the fractional index is telling us

what number is it? 1 is not going to do it...by the time you get to 3 as your 'something' you are way off the scale

so....the number must be....2

now..the numerator of the fractional index says 2...this time then

something x something is the number you want.

You can also read it as the square of the 5th root of 32

Another example .... 81^3/4

something x something x something x something = 81
that something is 3
so
3x3x3 gives us the numerator value which = 27
0
#5
Sorry i should probably make myself clearer. How do i do this without a calculator?
0
8 years ago
#6
Quite simple, it's just indices.
32^2/5 = 32^0.4 = 4
0
8 years ago
#7
Please tell me you are not doing C1 this week?
0
#8
(Original post by clownfan)
Why make it that hard? If the poster cant find the answer to this then knowing the 5th root of 1024 is going to be harder...

something x something x something x something x something = 32

thats what the denominator of the fractional index is telling us

what number is it? 1 is not going to do it...by the time you get to 3 as your 'something' you are way off the scale

so....the number must be....2

now..the numerator of the fractional index says 2...this time then

something x something is the number you want.

You can also read it as the square of the 5th root of 32

Another example .... 81^3/4

something x something x something x something = 81
that something is 3
so
3x3x3 gives us the numerator value which = 27
Thank you! This stuff makes more sense now

And thanks for trying to help me ibysaiyan
0
#9
(Original post by clownfan)
Please tell me you are not doing C1 this week?
Please don't start mocking me. I know im screwed. I guess im one of those who prefers M1 to C1
0
8 years ago
#10
(Original post by amani-puresapphire)
Thank you! This stuff makes more sense now

And thanks for trying to help me ibysaiyan
Sorry if I over-did it there.
anyways you got the jist of it which matters.
=)
0
#11
(Original post by ibysaiyan)
Sorry if I over-did it there.
anyways you got the jist of it which matters.
=)
No problem
0
8 years ago
#12
Its the square of the fifth root of 32. In c1 the numbers are set up so you can do them in your head. So its fifth root of 32, which is 2. Then 2^2.
0
8 years ago
#13
(Original post by amani-puresapphire)
Please don't start mocking me. I know im screwed. I guess im one of those who prefers M1 to C1
I wasnt mocking...it seems very strnge that you would prefer M1 as you have to use most of the basics of C1 (and more) in that module.

I have known many students do AS maths and not one has scored significantly more in M1 than C1..there have been the odd 93 to 91 for example but C1 is generally accepted as very easy in comparison as its basic number work in comparison to applied uses.
0
#14
(Original post by clownfan)
I wasnt mocking...it seems very strnge that you would prefer M1 as you have to use most of the basics of C1 (and more) in that module.

I have known many students do AS maths and not one has scored significantly more in M1 than C1..there have been the odd 93 to 91 for example but C1 is generally accepted as very easy in comparison as its basic number work in comparison to applied uses.
It kinda works differently in our school. Those who do physics generally find M1 easier and prefer it. but the majority who do not take physics are much better at C1. This is not to say those who take physics find C1 hard, only prefer it. I guess because i prefer M1, i spent more time on it and didn't focus on C1 alot. I understand the concepts after having them explained to me but the problem is, i have left it too late. I seem to have focused on all my other subjects and neglected C1.
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