JEE MAIN - Mathematics Hindi (2021 - 20th July Evening Shift - No. 2)

रेखाएँ x = ay $$-$$ 1 = z $$-$$ 2 और x = 3y $$-$$ 2 = bz $$-$$ 2, (ab $$\ne$$ 0) तब समतल में होंगी, यदि :

b = 1, a$$\in$$R $$-$$ {0}

a = 1, b$$\in$$R $$-$$ {0}