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Which law is correct?

Answer and explanation

Correct answer: (c^m\cdot c^n=c^{m+n})

When powers with the same base are multiplied, the exponent tells how many copies of that base are present. Thus \(c^m\) contains \(m\) copies of \(c\), and \(c^n\) contains \(n\) more copies. Multiplying them gives a total of \(m+n\) copies, which is written as \(c^{m+n}\). This is the product rule for exponents.

Therefore \(c^m\cdot c^n=c^{m+n}\), provided the expression is defined under the usual exponent conditions. The exponent is not multiplied, subtracted, or divided in this situation. Subtraction is used when dividing like bases, while multiplication of exponents appears in a power raised to another power, such as \((c^m)^n\). Hence option A is the correct law.

Related tags

PolynomialsExponent LawsFormula

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