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= 6. If f(x,y) and ф(x,y) are homogeneous functions of x,y of degree 6 and 4, respectively and u(x,y) = и - f(x,y) + ф(x
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= 6. If f(x,y) and ф(x,y) are homogeneous functions of x,y of degree 6 and 4, respectively and u(x,y) = и - f(x,y) + ф(x
= 6. If f(x,y) and ф(x,y) are homogeneous functions of x,y of degree 6 and 4, respectively and u(x,y) = и - f(x,y) + ф(x,y), then show that f(x,y) = i2 (+²3 + 2xy 2, +1²^^u) - { (xu +y). Әхду ту 12 дуг