Question
If x = 19, then the value of x5 -
20x4 + 20x3 - 20x2 + 20x - 1 isSolution
Given expression :Â x 5Â - 20x 4Â + 20x 3Â - 20x 2Â + 20x - 1 = x5 - 19x 4Â - x4 +Â 19 x 3Â + x3 -Â 19 x2 - x2 +Â 19 x + x - 1 = x5 -x5 -x4 + x4 +x3-x3-x2+x2+21 -1 [given that x = 19] = 19-1 = 18
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