NEB Class 11 • Mathematics • Calculus • Concept Guide

Continuity & Discontinuity: NEB Class 11 Maths Guide

Master Continuity and Discontinuity through clear concepts, representations, a reliable answer method and exam-focused practice.

ConceptsWorked reasoningNEB practice

Core concept

What Continuity and Discontinuity means physically

A function is continuous at a when f(a) exists, lim(x→a)f(x) exists and equals f(a). Discontinuities may be removable, jump or infinite and should be identified from both formula and graph.

Continuity at a requires lim(x→a−)f(x)=lim(x→a+)f(x)=f(a). For piecewise functions, solve parameter conditions from this equality.

The institutional reference gives the wider physical model; the CDC curriculum determines the NEB boundary.

Worked checkpoint with interpretation

f(x)=(x²−1)/(x−1) for x≠1 and f(1)=2 is continuous at 1 because the limit is 2.

Do not stop at the number. State what the sign, ratio, spacing, frequency or direction means. A common error is Checking only f(a), ignoring one-sided limits, calling every hole a vertical asymptote, or simplifying away a domain restriction.

NEB answer method

Model → evidence → equation → check

First identify the system and what the question asks. Label the diagram, apparatus or reaction with SI quantities, then state the principle before selecting an equation. Solve symbolically where possible and check units, limiting cases and chemical or physical meaning.

Stage	Question	Evidence
Model	What is idealised?	Assumption stated
Representation	Which diagram fits?	Labels or balanced equation
Calculation	Which relation follows?	Symbols then SI values
Evaluation	Does it make sense?	Unit, sign and trend check

Make the idea concrete in Nepal

Connect the model to a school laboratory, household technology, health, environment, energy or local material. The example should clarify the science rather than merely mention a place. Compare a prediction with an observation and record uncertainty.

Review the NEB Class 11 Mathematics revision roadmap and the complete Mathematics guide. For online or physical tuition, call 9846662070.

Frequently asked questions

Questions students ask about Continuity and Discontinuity

What is the central idea of Continuity and Discontinuity?+

A function is continuous at a when f(a) exists, lim(x→a)f(x) exists and equals f(a). Discontinuities may be removable, jump or infinite and should be identified from both formula and graph.

Which equation should I remember?+

Continuity at a requires lim(x→a−)f(x)=lim(x→a+)f(x)=f(a). For piecewise functions, solve parameter conditions from this equality.

How should I begin a numerical?+

Draw the situation, list known quantities in SI units, choose the governing relation symbolically, substitute once and finish with a unit and reasonableness check.

What is a common exam mistake?+

Checking only f(a), ignoring one-sided limits, calling every hole a vertical asymptote, or simplifying away a domain restriction.

How can I practise this topic?+

Alternate one concept explanation, one diagram and two numericals. Revisit errors after a day instead of only rereading the solution.

Where can I get tuition support?+

For online or physical KTM Tuition classes, call 9846662070. After Grade 12, the MKS Education panel below gives preparation and pre-counselling contacts.

References and next steps

Scope checked against CDC Nepal; concept support from an institutional reference and OpenStax Science. Continue with the Continuity and Discontinuity cluster.

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