1.Relation and Function
easy

मान लीजिए कि समुच्चय $N$ में, $R =\{(a, b): a=b-2, b>6\}$ द्वारा प्रदत्त संबंध $R$ है निम्नलिखित में से सही उत्तर चुनिए:

A

$(2,4) \in R$

B

$(3,8) \in R$

C

$(6,8)\in R$

D

$(8,7) \in R$

Solution

$R =\{( a ,\, b )\,: \,a = b -2,\, b >6\}$

Now,

since $b>6,(2,\,4) \notin R$

Also, as $3 \neq 8-2$

$\therefore (3,\,8) \notin R$ And, as $8 \neq 7-2$

$\therefore (8,\,7) \notin R$

Now, consider $(6,8)$

We have $8>6$ and also, $6=8-2$

$\therefore $  $(6,\,8) \in R$

The correct answer is $C$.

Standard 12
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.