Question

If the gcd (a,b)=1 then the gcd (a+b,ab)=

Answer 1

Step-by-step explanation:

always 1

by mathematical induction

let a=2,b=3

gcd=1 when numbers are prime or co prime

gcd(2,3)=1

gcd(a+b,ab)=gcd(5,6)= 1