Question

write the first four terms of an ap whose first term is 3 X + Y and common difference is x minus y

Answer 1

3x +y + x-y = 4x

4x + x - y = 5x -y

5x -y + x-y = 6x - 2y

3x+y, 4x , 5x-y, 6x - 2y

Answer 2

Here is your answer

t1=a=3x+y
common difference (d) =x-y

t1=a=3x+y

t2=t1+d=3x+y+x-y=4x

t3=t2+d=4x+x-y=5x-y

t4=t3+d=5x-y+x-y=6x-2y