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Thought-Process to Discover Knowledge

Welcome to nubtrek.

Books and other education websites provide "matter-of-fact" knowledge. Instead, nubtrek provides a thought-process to discover knowledge.

In each of the topic, the outline of the thought-process, for that topic, is provided for learners and educators.

Read in the blogs more about the unique learning experience at nubtrek.
11th-12th Foundation

### Limit of a function

Welcome to the only place where the essence of "limit of a function" is explained.

•  0/0 is called as indeterminate value -- meaning a function evaluating to 0/0 can take any value, it could be 0, or 1, or 7, or oo, or undefined.

•  other forms of indeterminate values are: oo/oo, oo-oo, 0^0, 0xx oo, or oo^0

Rigorous arithmetic calculations may result in 0/0, but the expression may take some other value. The objective of limits is to find that value. The details explained are revolutionary and provided nowhere else.

Once that is explained, the topics in limits are covered.
(click for the list of lessons in this topic)

Basics: Limit of a function

One and only place where the essence of limit(calculus) is explained.
•  Indeterminate Value
→  0/0
→  represented by an expression
→  other forms: oo/oo, oo-oo, 0^0, 0xx oo, or oo^0

•  The following can be true
→  0/0 = 0
→  0/0 = 1
→  0/0 = oo
→  0/0 = 6 or 8 or -3

Understanding the above is essential to understanding limits(calculus). The topic involves figuring out the expected value of a function when it evaluates to 0/0.

(click for the list of pages in the lesson)

Understanding limits with Graphs

Welcome to the astoundingly clear and simple lesson on understanding limits. The geometrical meaning of left-hand-limit and right-hand-limit are explained with graph of a function.

The function is considered as two constituent functions of numerator and denominator and using the graphs of these functions, the limit is explained.

Based on the understanding of numerator and denominator, the L'Hospital's Rule is explained.

(click for the list of pages in the lesson)

Calculating Limits

Examining a function at an input value is made simple and clear. Based on the information, how to determine if the function is defined, continuous, or not defined. The following are covered.

•  examining a function at an input value

•  limit of a continuous function

•  limit of a piecewise function

•  limit of functions with abrupt change

•  limit of functions that are not defined

(click for the list of pages in the lesson)

Algebra of Limits

In this page, Algebra of limits is detailed in a coherent and simple form -- the following are covered.

•  understanding algebra of limits,

•  Limit distributes over Addition and Subtraction when the value is not oo-oo.,

•  Limit distributes over multiplication, when the value is not oo xx 0,

•  Limit distributes over division when the value is not 0 -: 0 or oo -:oo,

•  Limit distributes over exponent, when the value is not oo^0 or 0^0

•  Limit with a variable can be substituted when value is not any of the forms of 0/0

(click for the list of pages in the lesson)

The pages in this lesson are

Limit of Algebraic Expressions

Standard results for limits of function involving polynomials and evaluating to 0/0, oo/oo, or oo - oo are examined and explained with examples.

•  limit of polynomials

•  limit of functions evaluating to 0/0

•  limit of functions evaluating to oo/oo

•  limit of binomials

•  limit of some standard trigonometric, logarithmic, and exponent functions

(click for the list of pages in the lesson)