(i) 2 and 8
GM between a and b is √ab
Let a = 2 and b = 8
GM = √2 × 8
= √16
= 4
(ii) a3b and ab3
GM between a and b is √ab
Let a = a3b and b = ab3
GM = √(a3b × ab3)
= √a4b4
= a2b2
(iii) –8 and –2
GM between a and b is √ab
Let a = –2 and b = –8
GM = √(–2 × –8)
= √–16
= -4