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2015-06-17T19:11:02+05:30
2x -1 = 0 x =1/2 Now, putting the value of x in p(x) 2x^4 - ax ^3+ 8x ^2 -x +4 = 1-a/8 + 16 +4 =21 - a /8 = 0 a/8=21 a = 21/8
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