Write: (i) The rational s that does not have a reciprocal. (ii) The rational s that are equal to their reciprocals.

Solution: (i) 43.123456789  Since this number has a terminating decimal expansion, it is a rational number of the form / and q is of the form 2×5 i.e., the prime factors of q...

(a) Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost shells. (b) Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells. (c) Neon (Ne),...

The product of a non zero rational and an irrational number is always irrational 

The reciprocal of an irrational number is an irrational

Solution: i. Since the given number has a terminating decimal expansion, it is a rational number of the form p/q and q is of the form 2m x 5n. The prime factors of...

(i) No (ii) 1, -1 (iii) -1/5 (iv) X (v) Rational number (vi) Positive

(i) 0  (ii) 1 and -1  (iii) 0 

No, because salt got dissolved completely into the water

Of course, water contains salt. It is completely mixed up with water

If there is no electricity in our city, there would be great scarcity of water. We would not able to use TV, computers etc. Even the mobile phone would not...