1) The minimum value of the sum of real numbers a−5,a−4,3a−3,1,a8 and a10 with a >0 is A) 2 B) 4 C) 8 D) 5 Answer: Option CExplanation:Using AM ≥ GM a−5+a−4+a−3+a−3+a−3+1+a8+a108 ≥(a−5.a−4.a−3.a−3.a−3.1.a8.a10)1/8 ⇒ a−5+a−4+3a−3+1+a8+a10≥8.1 Hence, minimum value is 8