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Permutations And Combinations
The sum of first three terms of a G.P. is and their product is -1. Find the terms.
Let a, ar be the three numbers in G.P.
Since their products is -1
∴
or a = - 1
Since the sum of the numbers
∴
-12 - 12r - 12r2 = 13r
4r(3r + 4) + 3(3r + 4) = 0 or
When a = -1 and then numbers are or
When a = -1 and then numbers are or
Sponsor Area
Determine K, so that K + 2, 4K – 6 and 3K – 2 are three consecutive terms of an A.P.
Sponsor Area