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  1. . f( x ) = 8x² + 2x ( a ) f( x ) = 8x² + 2x f( x + h ) = 8( x + h )² + 2( x + h ) = 8x² + 16xh + 8h² + 2x + 2h = 8x² + 2x + 16xh + 8h² + 2h slope = [ f( x + h ) - f( x ) ] / h = [ ( 8x² + 2x + 16xh + 8h² + 2h ) - ( 8x² + 2x ) ] / h = ( 16xh...

    1 Answers · Science & Mathematics · 03/09/2019

  2. Octants are stone age. Just say x<0? Before starting, you make the argument that the entire region is symmetric about xz plane and the integrand is an odd function of y, so you can just remove the +y part. The integral on the part of the region where y>0...

    2 Answers · Science & Mathematics · 05/05/2019

  3. Hint: a/ vertex at (h,k) p = -4 (y-k)^2 = 4p(x-h) b/ P(x,y) on the parabola, PH=distance to the directrix , F = focus point PH = PF

    1 Answers · Science & Mathematics · 22/09/2018

  4. ...(x,y) to F'(-c,0) is √[ (x+c)² + y² ] PF = √[ (x-c)² + y² ] = √[ x² - 2xc + c² + b²...

    2 Answers · Science & Mathematics · 09/01/2018

  5. ...with named endpoints: PT is the tangent segment, and PF is the entire secant segment, with PN the "external" part of the...

    1 Answers · Science & Mathematics · 03/12/2017

  6. ... PQ is a focal chord, then PQ has the same slope as PF (or QF) Slope PQ: ∆y/∆x = ¾ Slope...

    2 Answers · Science & Mathematics · 03/04/2018

  7. OB = OD (radius) OC = PF (radius) BC = DF (given) => △OBC = △ODF

    2 Answers · Science & Mathematics · 16/08/2017

  8. ... the locus of all points equidistant from the focus and the directrix. PF = PD √[(x - 1)² + (y - 3)²] = |y - 2| (x - 1)² + (y...

    1 Answers · Science & Mathematics · 24/06/2017

  9. ... distances from the foci is equal to this constant: PF + PG Use the distance formula.

    1 Answers · Science & Mathematics · 25/04/2017

  10. The cost function (price per kg of the fish) in the market can be written as: P(r,t) = Pe - (1 - r/R)*[Pe - Pc(t)] where Pc(t) is the time-dependent price at the center of the market. Pc(t) = Pc0 + k*t where k = $290/(kg*hr) and 0 <...

    2 Answers · Science & Mathematics · 22/02/2017

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