Really Easy Maths Question! (1 Viewer)

[MotivationSeek]

Ok so it's simple,

Differentiate:

2x^3 + 5x /x

Thats two x to the power of three plus five x all over x.
Its easy but the answer I get doesn't match with the textbook one!
Thanks

 

[nightweaver066]

 

[thorax94]

Using the quotient rule: DY/DX= 4x

 

[AAEldar]

Confirmed true.

Next time make sure you include brackets in the question so it's less ambiguous though >.<

 

[kwu1]

If it's really easy, why are you asking it?

 

[ohexploitable]

Using the quotient rule: DY/DX= 4x

lol

 

[kwu1]

Shortcut

 

[MotivationSeek]

Well if you read the whole question you would see that I said my answer doesn't match with that of the textbook. As far as I'm concerned the textbook must be wrong because everyone here has got the same answer as me..

 

[SpiralFlex]

Well if you read the whole question you would see that I said my answer doesn't match with that of the textbook. As far as I'm concerned the textbook must be wrong because everyone here has got the same answer as me..

What does answer in the text say?

 

[imZerroo]

u= 2x^3 + 5x v= x
u'= 6x^2 + 5 v'= 1

y'= (6x^3 +5x -2x^3 -5x)/x^2
= (4x^3)/x^2
= 4x

 

[SpiralFlex]

u= 2x^3 + 5x v= x
u'= 6x^2 + 5 v'= 1

y'= (6x^3 +5x -2x^3 -5x)/x^2
= (4x^3)/x^2
= 4x

You don't need to use the quotient rule.

 

[artosis]

u= 2x^3 + 5x v= x
u'= 6x^2 + 5 v'= 1

y'= (6x^3 +5x -2x^3 -5x)/x^2
= (4x^3)/x^2
= 4x

lol.
gets the job done at least.

 

[MotivationSeek]

(4x^2+10)/x

I just worked out the mistake they made!

 

[asianese]

LOL@QUOTIENT RULE!

Its a single term denom guys...