What are the different types of Industries. Explain it.
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an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).
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Primary industry involves getting raw materials e.g. mining, farming and fishing. Secondary industry involves manufacturing e.g. making cars and steel. Tertiary industries provide a service e.g. teaching and nursing. Quaternary industry involves research and development industries e.g. IT.
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