2 X + 1 ka cube iska derivative
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as we know the identity
(a+b)^3=a^3+3a^2b+3ab^2+b^3
Let 2x=a & 1=b
(2x+1)^3=8x^3+12x^2+6x+1
(a+b)^3=a^3+3a^2b+3ab^2+b^3
Let 2x=a & 1=b
(2x+1)^3=8x^3+12x^2+6x+1
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