Introduction to limits

This lesson focuses on introduction to limits. Mathematics provides tools for modeling and analyzing complex systems.

Calculus is the mathematics of change and accumulation. Limits describe what a function approaches as the input approaches a value: lim(x→2) of x² = 4, even if x never equals 2. Continuity means no breaks, jumps, or holes—if lim(x→a) f(x) = f(a), the function is continuous at a. The derivative measures instantaneous rate of change—the slope of the tangent line at any point. Notation: f'(x), dy/dx. Power rule: d/dx[xⁿ] = nxⁿ⁻¹. The derivative of position is velocity; the derivative of velocity is acceleration. The integral (antiderivative) finds accumulated area under a curve. Fundamental Theorem of Calculus: differentiation and integration are inverse operations. ∫f(x)dx = F(x) + C (indefinite); ∫[a,b]f(x)dx = F(b) − F(a) (definite, gives exact area). Calculus underlies physics, engineering, economics, and machine learning.

As you engage with this material, consider both the theoretical foundations and practical applications. Think critically about how this concept builds on prior knowledge and where you might apply it beyond the classroom.

Challenge yourself to go beyond memorization—seek to understand the "why" behind the processes and principles.