Israel Hernandez

City College of New York
Adjunct Lecturer/10 years

Biography

I completed my Master’s degree in Mathematics in 2016. I developed my passion
for mathematics as a young child. I have 10+ years of tutoring experience and 10+ years of adjunct lecturing experience in mathematics. Moreover, I have taught many different levels of mathematics, from basic mathematics to advanced mathematics such as linear algebra and differential equations. I enjoy assisting students’ learning and understanding mathematics remotely or in person, whether they need help approaching a relatively easy problem or are grappling with more challenging concepts.

I come from the lowest of the lowest. My parents separated before I was born, sent me to Mexico with the parents of my father who neglected his responsibilities and duties as a guardian. I ran away to find my maternal parents at the age of 5 and after almost a year of being in the streets i found them, but things were no better than before. I was a goatherd and a farmer in the making. The closest school was literally two hours away through rough terrain. Without abandoning my duties I was allowed to attend school a few hours a day for a few months in the year. This was only the beginning of an arduous journey ahead. In summary, I met my mother at the age of 14; the worst experience of my life. My education was on the brink of being extinguished. Despite it all, I have made it out and now I can help others make it out as well.

Education

BA Math
City College of New York
MS Math
City College of New York

Educator Statistics

Numerade tutor for 5 years
5761 Students Helped

Topics Covered

Unlock Insights with Data-Driven Graphs & Statistics
Mastering Equations and Inequalities: Your Guide to Mathematical Success
Functions
Breaking Limits: Unlock Your Potential with Our Expert Solutions
Mastering Integrals: Tips and Tricks for Calculus Success
Mastering Multiple Integrals: Techniques and Tips
Exploring the World of Derivatives: A Comprehensive Guide
Master Vector Calculus with Our Comprehensive Guide
Integration
Mastering Integration Techniques for Optimal Results
Applications of Integration: Exploring Real-World Solutions
Stand Out with Differentiation Strategies | Boost Your Business
Discover the Best Series to Binge-Watch | Your Ultimate Guide
Mastering Partial Derivatives: Essential Techniques and Tips
Unlock the Power of Sequences: Boost Your Productivity
Power Series

Israel's Textbook Answer Videos

02:20
Calculus: Early Transcendentals

Each integral represents the volume of a solid. Describe the solid.

$ \displaystyle \int_{1}^3 2 \pi y \ln y dy $

Chapter 6: Applications of Integration
Section 3: Volumes by Cylindrical Shells
Israel Hernandez
02:16
Calculus: Early Transcendentals

Use the Ratio Test to determine whether the series is convergent or divergent.
$ \displaystyle \sum_{n = 1}^{\infty} \frac {n^{100} 100^n}{n!} $

Chapter 11: Infinite Sequences and Series
Section 6: Absolute Convergence and the Ratio and Root Tests
Israel Hernandez
02:39
Calculus

Let $a_{n}=\left\{\begin{array}{l}{n / 2^{n}} \\ {1 / 2^{n}}\end{array}\right.$ if $n$ is a prime number
otherwise. Does $\sum a_{n}$ converge? Give reasons for your answer.

Chapter 10: Infinite Sequences and Series
Section 5: The Ratio and Root Thsts
Israel Hernandez
03:40
Calculus Early Transcendentals

Find an equation of the tangent plane to the given parametric surface at the specified point.
$$x=u+v, \quad y=3 u^{2}, \quad z=u-v ; \quad(2,3,0)$$

Chapter 16: Vector Calculus
Section 6: Parametric Surfaces and Their Areas
Israel Hernandez
03:22
Calculus

$1-12$ Find the area of the surface.
The part of the plane $5 x+3 y-z+6=0$ that lies above the
rectangle $[1,4] \times[2,6]$

Chapter 15: Multiple Integrals
Section 5: Surface Area
Israel Hernandez
04:34
Calculus

$1-12$ Find the area of the surface.
The part of the plane $6 x+4 y+2 z=1$ that lies inside the
cylinder $x^{2}+y^{2}=25$

Chapter 15: Multiple Integrals
Section 5: Surface Area
Israel Hernandez
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Israel's Quick Ask Videos

02:41
Calculus 1 / AB

A rancher has 600 feet of fence in which to enclose four
identical adjacent rectangular corrals along a river. If no
fence is needed along the river, what are the dimensions of each
enclosed corral so that the entire enclosed area is a maximum?

Israel Hernandez
03:28
Calculus 1 / AB

Use a triple integral to find the volume of the solid in the first octant bounded by the graphs of the cylinder z = 9 - x^2 and the plane y = x.

Israel Hernandez
02:40
Calculus 1 / AB

Find the volume of the solid formed by rotating the region
bounded by the given curves about the indicated axis.
y = 1/x, y = 1, y = 5, x = 0; about the y-axis

Israel Hernandez
03:23
Calculus 3

The density of a spherical solid of radius 2, centered at the
origin, is given by D(ρ) = 4ρ grams per cm^3. Calculate the mass of
the portion of the sphere lying above the plane z =√3.

Israel Hernandez
02:45
Calculus 1 / AB

Find the volume of the solid by subtracting two volumes, the solid enclosed by the parabolic cylinders y = 1 - x^2, y = x^2 - 1, and the planes x + y + z = 2, 5x + 4y - z + 18 = 0.

Israel Hernandez
04:52
Calculus 1 / AB

Use a triple integral to find the volume of the solid between
the sphere x^2 +y^2 + z^2 = 19 and the hyperboloid z^2-y^2-x^2 = 1
for z > 0 in cylindrical coordinates

Israel Hernandez
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