Tolong Bantuin Pr Dari guru gwe y ,please?
Buktikan bahwa:
(px+qy)x(pq+xy) besar samadengan 4pqxy!
Buktikan bahwa:
(px+qy)x(pq+xy) besar samadengan 4pqxy!
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p²qx + px²y + pq²y + qxy² ≥ 4pqxy
qx(p² + y²) + py(x² + q²) ≥ 4pqxy
p² + y² = 4py
x² + q² = 4xq
qx(4py) + py(4xq) ≥ 4pqxy
4pqxy + 4pqxy ≥ 4pqxy
8pqxy ≥ 4pqxy
(terbukti)