Question

If z = f (x + ay) + ¢(x - ay), prove that d²z/dy²=a²d²z/dx²
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Answer 1

Answer:

don't know

sorry

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke