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value evaluation MCQ Questions for Class 12

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Question 1/1 Medium Mathematics Relations and Functions Binary operations Class 12 Level 30

वास्तविक संख्याओं पर (a*b=a+b+ab) के लिए (1*2) का मान क्या है?

For (a*b=a+b+ab) on real numbers, what is the value of (1*2)?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

Put (a=1) and (b=2) in the given rule.

Step 2

Why this answer is correct

\(1*2=1+2+1\cdot2=5\).

Step 3

Exam Tip

Even in simple evaluation, do not treat the operation symbol as ordinary multiplication. चरण 1: दिए गए नियम में (a=1) और (b=2) रखें। चरण 2: \(1*2=1+2+1\cdot2=5\)। चरण 3: सरल मूल्यांकन में भी संक्रिया के चिन्ह को सामान्य गुणा न समझें।

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