Let g= gl2, r) and h = l0 :aand b are nonzero integers) under the operation of matrix multiplication. prove or disprove that h is a subgroup of gl(2, r).

Let G= GL2, R) and H = l0 :aand b are nonzero integers) under the operation of matrix multiplication. Prove or disprove that H is a subgroup of GL(2, R).