4. Prove that var(ax + bY) = a² var(X) + b² var (Y) + 2ab cov (Y, X)
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- What is the trial particular solution for g(x) = (x2 - 1) sin2x a.) yp = (Ax2 + B) sin2x b.) yp = (Ax2 - B) sin2x c.) yp = (Ax2 - B) sin2x + (Cx2 - E) cos2x d.) yp = (Ax2 + B) sin2x + (Cx2 + E) cos2x e.) yp = (Ax2 + Bx + C) sin2x + (Ex2 + Fx + G) cos2x f.) yp = (Ax2 + Bx - C) sin2x g.) yp = (Ax2 + Bx + C) sin2x h.) yp = (Ax2 + Bx - C) sin2x + (Ex2 + Fx - G) cos2xhow can I submit this: xfx+yfy=nf f is a homogeneous of degree n