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A. 1 |
| B. 2 |
| C. 12 |
| D. 63 |
| E. 64 |
[ 5-A171 - op net sinds 31.3.2026-(E)-19.10.2026 ]
Translation in E N G L I S H
Oplossing - Solution
\(\displaystyle\lim_{x\to0}\;\frac{\sin^62x-x^6}{x^6}=\lim_{x\to0}\;\frac{\sin^32x-x^3}{x^3}\cdot\lim_{x\to0}\;\frac{\sin^32x+x^3}{x^3}\\=\displaystyle\lim_{x\to0}\;\left[\frac{(\sin 2x-x)(\sin^22x+x.\sin2x+x^2)}{x\cdot x^2}\right]\cdot\lim_{x\to0}\;\left[\frac{\sin^32x}{x^3}+\frac{x^3}{x^3}\right]\\=\displaystyle\lim_{x\to0}\;\frac{\sin2x-x}{x}\cdot\lim_{x\to0}\;\frac{\sin^22x+x.\sin2x+x^2}{x^2}\cdot(2^3+1)\\=(2-1)(2^2+2+1)(2^3+1)=1.7.9=63\)
\(\text{We houden rekening met het feit dat}\\\to\qquad\displaystyle\lim_{x\to0}\;\frac{\sin^n\,ax}{x^n}=a^n\\\text{een direct gevolg van de bekende limiet}\;\displaystyle\lim_{x\to0}\;\frac{\sin x}{x}=1\)
\(\text{Merk op dat we hetzelfde resultaat verkrijgen als we sinus weglaten!}\\\displaystyle\lim_{x\to0}\;\frac{\sin^62x-x^6}{x^6}=\lim_{x\to0}\;\frac{(2x)^6-x^6}{x^6}=\lim_{x\to0}\;\frac{64x^6-x^6}{x^6}=63\)
gricha - vA171 - 31.3.2026