Question

1] If a and b are positive rational numbers, then...
a) va,vb are rational number b) a+b ,ab are rational numbers
c) a/b ,b/a are rational number
d) Va+vb,v(ab) are rational numbers
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Answer 1

Answer:

option b is correct

Step-by-step explanation:

VA can be a rational or irrational as an example(v)22/7*(a)2=44/7 =a irrational number

wherase (v) 5*(a)2 =10=rational number

same applies for all the option but as given a and b are rational numbers then a+b=a rational number

in option a/b can also be 22/7 which is a irrational number so correct option is B