कौन-सा कथन हमेशा सत्य है यदि \(f:A\to B\) एक फलन है?
Which statement is always true if \(f:A\to B\) is a function?
Explanation opens after your attempt
A. हर \(a\in A\) के लिए \(f(a)\in B\) unique होता हैFor every \(a\in A\), \(f(a)\in B\) is unique
Concept
In a function, every domain element has a unique image in the codomain. The whole codomain need not become the range.
Why this answer is correct
The correct answer is A. हर \(a\in A\) के लिए \(f(a)\in B\) unique होता है / For every \(a\in A\), \(f(a)\in B\) is unique. In a function, every domain element has a unique image in the codomain. The whole codomain need not become the range.
Exam Tip
function में हर domain element की unique image codomain में होती है। यह जरूरी नहीं कि पूरा codomain range बन जाए।
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