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Q: यदि सभी प्राकृतिक संख्याओं a और b के लिए a * b = a2 + b2 – ab है, तो 9 * 10 का मान है
  • A. 90
  • B. 91
  • C. 181
  • D. 182
Correct Answer: Option B - a * b = a² + b² – ab तो 9 * 10 = 92 + 102 – 9 × 10 = 81 + 100 – 90 = 181 – 90 = 91
B. a * b = a² + b² – ab तो 9 * 10 = 92 + 102 – 9 × 10 = 81 + 100 – 90 = 181 – 90 = 91

Explanations:

a * b = a² + b² – ab तो 9 * 10 = 92 + 102 – 9 × 10 = 81 + 100 – 90 = 181 – 90 = 91