MYTUTOR SUBJECT ANSWERS

60 views

Given y=x^3+5x+3 find dy/dx when x=3

The question can be broken into two steps, 

1) dy/dx is asking to differentiate y=x3+5x+3 with respect to x

Differentiating we multiply by the current power and lower this powers value by 1. ( Constants differentiate to nothing )

i.e  x3 goes to 3x2

dy/dx=  3x2+5

2) Next we need to find the value of dy/dx when x=3 done simply by substituting all x's in the equation by 3

dy/dx=  3*(3)+ 5 = 32

Robert L. GCSE Maths tutor, A Level Maths tutor, GCSE Geography tutor...

2 months ago

Answered by Robert, a GCSE Maths tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

327 SUBJECT SPECIALISTS

£22 /hr

Ashleigh H.

Degree: Physics (Masters) - University College London University

Subjects offered: Maths, Science+ 2 more

Maths
Science
Physics
Chemistry

“ I believe tutoring isn't just about helping a student get to grips with the content of their course, but also building their confidence and exam technique”

£22 /hr

Zahra K.

Degree: Discrete Mathematics (Bachelors) - Warwick University

Subjects offered: Maths, Physics+ 1 more

Maths
Physics
Further Mathematics

“Hey, I'm Zahra and I study Discrete Maths at Warwick. I've worked for a tuition company and been a tutor for quite a few years and my approach to sessions has always been focused but relaxed.  I can explain concepts, work through exam...”

£18 /hr

Nishit B.

Degree: Engineering (Masters) - Oxford, New College University

Subjects offered: Maths, Physics+ 1 more

Maths
Physics
-Personal Statements-

“I am a second year Engineering undergraduate at the University of Oxford. I am happy to help with A-level/GCSE Maths.”

MyTutor guarantee

About the author

Robert L.

Currently unavailable: for regular students

Degree: Geophysics (Masters) - University College London University

Subjects offered: Maths, Physics+ 1 more

Maths
Physics
Geography

“Hi, my name is Robert and I'm studying Geophysics at University College London, currently in my second year, with an interest in hazard and disaster reduction. Having been tutored myself in the past I know the importance of an underst...”

MyTutor guarantee

You may also like...

Other GCSE Maths questions

What is the highest common factor of 24 and 90?

How do I expand out a pair of brackets?

Why is anything to the power 0 equal 1?

How can I know whether to multiply or add probabilities?

View GCSE Maths tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok