can someone help with this question please "the gradient function of y=ax^2 + bx + c is 4x+2. The function has a minimum value of 1. Find the values of a, b and c"
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Originally Posted by 24680 can someone help with this question please "the gradient function of y=ax^2 + bx + c is 4x+2. The function has a minimum value of 1. Find the values of a, b and c" The gradient function is the derivative of y, so dy/dx = 2 a x^2 + b = 4 x +2, so we have a=2, b=2. The minimum occurs where y'=4x+2=0, or where x=-1/2, and at -1/2 y(-1/2) = 1 - 1 + c = c, but we are told that this minimum is 1, so c=1. RonL
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