Progression (Sequence and Series)Hard
Question
If a, b and c are distinct positive real numbers and a2 + b2 + c2 = 1, then ab + bc + ca is -
Options
A.equal to 1
B.less than 1
C.greater than 1
D.any real number
More Progression (Sequence and Series) Questions
A right angled triangular shaped frame ABC rests in xy plane as shown in figure. It starts sliding over x-axis keeping A...If S denotes the sum to infinity and Sn the sum of n terms of the series 1+ + ...., such that S − Sn .< , then ...The sum of n terms of the series log a + log + log + ... is-...The third term of an A.P. is 9 and the difference of the seventh and the second term is 20. If the number 2001 is the nt...If the mean of the set of numbers x1, x2, x3,....,xn is , then the mean of the numbers xi + 2i, 1 ≤ i ≤ n, i...