Minimum value of the sum of the numbers `a^(-5),a^(-4),2a^(-3),6,a^(8)` and `a^(7)` is

The minimum value of the sum of real numbers a^(-5),a^(-4),3a^(-3),1,a^(8)" and "a^(10)" with "agt0 is

The minimum value of the sum of real number a^(-5),a^(-4),3a^(-3),1,a^(8) and a^(10) with a>0 is

The sum of two non-zero numbers is 8 ,the minimum value of the sum of their reciprocals is (1)/(4) (b) (1)/(2) (c) (1)/(8) (d) none of these

Find the mean of the numbers 7.6, 6.8, 8.5, 9.4, 5.9, 6.4, 9.1 and 4.7

The value of the sum in the 50^(th) bracket of (1)+(2+3)+(4+5+6)+(7+8+9+10)+... is

The sum of the series (5)/(1.2.3)+(7)/(3.4.5)+(9)/(5.6.7)+.... is equal to