[填空题]
A curve y=f(x) passesxiw6.oo pim1kto,9eim 4(/r jky),eq k ii 7v(r5ubw5 through point P(2,7) and has a gradient of f '(x)=4x−3.
1.Find the gradient of the curve at point P.
f'(2)= .
2.Find the equation of the tangent to the curve at point P.
y=ax-b , a= , b= .
3.Determine the equation of the curve.
y=ax$^2$-bx+c ; a= , b= , c= .