Question

if abc x,y,z all are real number and a2+b2+c2=25 x2+y2+z2=36 ax+by+cz=30 find the value of a+b+c/x+y+z

Answer 1

2( a+b+c )=25

2(X+y+z)=36

a+b+c/X+y+z= 25/36