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Question

Find a rational number lying between
(i) 14 and13
(ii) 38 and25
(iii) 1.3 and 1.4
(iv) 0.75 and 1.2
(v) -1and12
(vi) -34and-25

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Solution

(i) Let:
x = 14 and y = 13
Rational number lying between x and y:
12x + y = 1214 + 13
= 724

(ii) Let:
x = 38 and y = 25
Rational number lying between x and y:
12x + y = 1238 + 25
= 1215+1640 = 3180

(iii) Let:
x = 1.3 and y = 1.4
Rational number lying between x and y:
12x + y = 121.3+1.4
= 122.7= 1.35

(iv) Let:
x = 0.75 and y = 1.2
Rational number lying between x and y:
12x + y = 120.75+1.2
= 121.95= 0.975

(v) Let:
x = -1 and y = 12
Rational number lying between x and y:
12x + y = 12-1 + 12
= -14

(vi) Let:
x = -34 and y = -25
Rational number lying between x and y:
12x + y = 12-34 - 25
= 12-15-820 = -2340

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