किस विकल्प में दिया गया नियम \(f:\mathbb{N}\to\mathbb{N}\) वैध फलन नहीं है?
Which option gives a rule that is not a valid function \(f:\mathbb{N}\to\mathbb{N}\)?
Explanation opens after your attempt
Correct Answer
C. (f(n)=\frac{n}{2})
Concept
At (n=1), \(\frac{n}{2}=\frac{1}{2}\) is not a natural number. In \(\mathbb{N}\to\mathbb{N}\), every natural input must have a natural value.
Why this answer is correct
The correct answer is C. (f(n)=\frac{n}{2}). At (n=1), \(\frac{n}{2}=\frac{1}{2}\) is not a natural number. In \(\mathbb{N}\to\mathbb{N}\), every natural input must have a natural value.
Exam Tip
(n=1) पर \(\frac{n}{2}=\frac{1}{2}\) प्राकृतिक संख्या नहीं है। \(\mathbb{N}\to\mathbb{N}\) में हर प्राकृतिक इनपुट का मान प्राकृतिक होना चाहिए।
Login to save your score, XP, coins and progress.