TutorMe homepage

SIGN IN

Start Free Trial

Reyaz A.

Experienced mathematics and physics tutor from class 8th to 12th

Tutor Satisfaction Guarantee

Applied Mathematics

TutorMe

Question:

What is Commutative, Associative and Distributive laws in maths?

Reyaz A.

Answer:

Commutative laws say we can swap numbers, and you still get the same number when you add, for example, a+b = b+a and same for multiplication. Associative laws say it does not matter how we group the number final value will remain the same, for example, (a+b)+c = (a+b)+c , and same for multiplication Distributive laws say that we can have the same answer while multiplying a number by a group of numbers added together or multiplying them separately and then add them, For example, a x ( b+c) = axb + axc

Calculus

TutorMe

Question:

f(x, y) = sin(xy) + x2 ln(y) Find fyx at (0, π⁄2)

Reyaz A.

Answer:

Explanation: fy = xcos(xy) + x2⁄y fyx = cos(xy) – xysin(xy) + 2x⁄y Put (x,y) = (0, π⁄2) = 1

Algebra

TutorMe

Question:

If x3 + y3 = 9 and x + y = 3, then the value of x4+y4 is,

Reyaz A.

Answer:

x3+y3 = (x + y) × (x2 − xy + y2) Putting given values of x3+y3 and (x + y) 9 = 3 × ((x+y)2 − 3xy) = 3 × (9 − 3xy) = 27 − 9xy 9xy = 18 xy = 2 x4 + y4 = (x2 + y2)2 - 2x2y2 = (x2 + y2)2 - 2*4 [Putting value of xy] = ((x + y)2 - 2xy)2 - 2*4 [Putting values of (x+y) and xy] = (9 - 4)2 - 2*4 = 17

Send a message explaining your

needs and Reyaz will reply soon.

needs and Reyaz will reply soon.

Contact Reyaz

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.

Made in California

© 2019 TutorMe.com, Inc.