Determine the value of 'b' for which polynomial 5x^3 -x^2+ 4 x + b is divisible by 1 - 5x
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firstly find out value of x
1-5x=0
5x=-1
x=-1/5
put x value in equation
1-5x=0
5x=-1
x=-1/5
put x value in equation
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