यदि \(f:\mathbb{Z}\to\mathbb{Z}\), (f(n)=3n) है, तो (f) आच्छादी क्यों नहीं है?
If \(f:\mathbb{Z}\to\mathbb{Z}\), (f(n)=3n), why is (f) not onto?
Explanation opens after your attempt
A. क्योंकि (1) जैसा पूर्णांक नहीं मिलताBecause an integer like (1) is not obtained
Concept
(3n) हमेशा (3) का गुणज होता है। / (3n) is always a multiple of (3).
Why this answer is correct
सहप्रांत \(\mathbb{Z}\) में (1) है, जो (3n) के रूप में नहीं लिखा जा सकता। / The codomain \(\mathbb{Z}\) contains (1), which cannot be written as (3n).
Exam Tip
गुणजों वाले फलन में छूटे हुए पूर्णांकों को देखें। / For multiple-based functions, look for integers that are missed.
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