यदि ({2a+1}={7}), तो (a) का मान क्या है?
If ({2a+1}={7}), what is the value of (a)?
Explanation opens after your attempt
B. (3)
Concept
The singleton sets are equal, so (2a+1=7). This gives (a=3).
Why this answer is correct
The correct answer is B. (3). The singleton sets are equal, so (2a+1=7). This gives (a=3).
Exam Tip
एक-सदस्यीय समुच्चय बराबर हैं, इसलिए (2a+1=7)। इससे (a=3) मिलता है।
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