Let R = {(x, y) : x, y Z, y = 2x 4}. If (a, 2) and (4, b2)R, then write the values of a and b.

Here,R={(x,y) : x, yϵZ, y=2x-4}


Now,(a,-2)ϵ R -2=2a-4


2a=-2+4


2a=2


a=1


Also,(4,b2)ϵ R b2=2×4-4


b2=8-4


b2=4


b=±2


1