ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Maths · STD 12 - 1. relation and function

જો \(S=\{1,2,3,4,5,6,7\} \) આપેલ છે.  વિધેય \(f:S \rightarrow S\) કેટલા શક્ય બને કે જેથી દરેક \(m, n \in S\) માટે \(f(m \cdot n)=f(m) \cdot f(n)\) અને \(m . n \in S\) થાય.

  1. A \(500\)
  2. B \(600\)
  3. C \(570\)
  4. D \(490\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(490\)

Step-by-step Solution

Detailed explanation

\(f(m n)=f(m) \cdot f(n)\) Put \(m=1 f(n)=f(1) \cdot f(n) \Rightarrow f(1)=1\) Put \(m=n=2\) \(f(4)=f(2) \cdot f(2)\) \(f(2)=1 \Rightarrow f(4)=1 \text { or } f(2)=2 \Rightarrow f(4)=4\) Put \(m=2, n=3\) \(f(6)=f(2) \cdot f(3)\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app