Enable contrast version

Tutor profile: John H.

Inactive
John H.
Doctorate in Mathematics, teacher and private tutor for 5 years
Tutor Satisfaction Guarantee

Questions

Subject: Python Programming

TutorMe
Question:

How would I use a loop to print out the following in python: * ** *** **** *****

Inactive
John H.
Answer:

The print syntax depends on if you're using Python 2 or Python 3. Let's assume you're using Python 3. To print a single star you can use the following statement: print("*") To print 5 stars you can do this: print("*"*5) So, to print your output, we can use a nifty loop: for i in range(1,6): print("*"*i) Try that out!

Subject: Linear Algebra

TutorMe
Question:

What is the kernel of a linear transformation? And how would I find it if I have a matrix?

Inactive
John H.
Answer:

Let's call our linear transformation $$L: V \rightarrow W$$. The kernel is a subspace of the domain of the linear transformation. It is the set of all vectors $$v$$ that are sent to zero under the transformation. If you have a matrix for $$L$$, you would put it into reduced row echelon form. If the matrix has a nontrivial kernel there will be rows of zeros in the matrix. Take the nonzero rows and write down their linear equations. There will be free variables since there are less equations than variables. Write down general form solutions with free variables - these will be a basis for your kernel.

Subject: Calculus

TutorMe
Question:

What is the derivative of $$3x^2 + cos(x)$$?

Inactive
John H.
Answer:

We can take the derivative of each individual term that is added together. The derivative of $$3x^2$$ is $$6x$$ from the power rule. The derivative of $$cos(x)$$ is $$-sin(x)$$. So, overall, the derivative is $$6x - sin(x)$$

Contact tutor

Send a message explaining your
needs and John will reply soon.
Contact John

Request lesson

Ready now? Request a lesson.
Start Lesson

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 Lesson" 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.
BEST IN CLASS SINCE 2015
TutorMe homepage
Made in California by Zovio
© 2020 TutorMe, LLC
High Contrast Mode
On
Off