PLEASE ANSWER
Asked by | 4th May, 2009, 04:50: PM
Expert Answer:
X = 3+32/3+31/3
This series is a GP 31/3 + 32/3 + 33/3
First Term = 31/3
Common ratio = 31/3
Sum = X = 31/3 + 32/3 + 33/3
= 31/3 ((31/3)3 - 1)/ (31/3 - 1))
= 31/3 (2)/ (31/3 - 1)
= 2 . 31/3/ (31/3 - 1)
Substituting the value of 31/3 , we get the value of X = 6.5
Now to compute the value of expression X3 -9X 2 +18X -12 substitute X = 6.5
X3 -9X 2 +18X -12 = (6.5)3 -9(6.5) 2 +18(6.5) -12
= -0.625
Answered by | 1st Sep, 2009, 04:15: PM
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