// Numbas version: finer_feedback_settings {"name": "Mat 2B - Bab 8 - No 4", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Mat 2B - Bab 8 - No 4", "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "
Diberikan matriks $A=\\begin{bmatrix}
1&\\var{a} &\\var{b}\\\\
0&1&\\var{b}\\\\0&0&1
\\end{bmatrix}$. Perhatikan bahwa $A\\cdot A^T=I$.
Pernyataan berikut yang benar adalah $\\ldots$.
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