Question

plz answer its really urgent

anwer the all questions

class 10 maths
chapter real numbers,sets and polynomials ​

Answer 1

Answer:

(1)-

(i) Months of the year starting with letter 'J' is always fixed and cannot be changed.

so,

It is a set.

(ii) The 10 most talented writers of India are different from each other they are not same.

so, it is not a set.

Answer:

(2) first step:

how many rational numbers you have to find :

3 { All rational numbers you have to find first write that }

then, add 1

3+1= 4

After that, divide the no. 4 to that no. which gives you ans 2 same as another.

8/4=2, 12/4=3

so now,

Rational number between 2and 3 are:

8/4< 9/4< 10/4<11/4<12/4

Answer:

(3) check whether it is rational or irrational. (3+√ 2) (3-√2)

by the identity,

(a+b) (a- b) = a^2-b^2

The value of a=3 and b= √2

so by identity a^2-b^2

(3)^2-(√2)^2 { square root cancel to the power 2 of root 2}

9-2=7

so,

we can write 7 in the form of p by q where Q is not equal to zero.

=7/1

so, it is rational.

Hope you will understand and it helps you

Thankyou