Q. Express the following fraction in simplest form, only using positive exponents.(−3y−4)4−5y6Answer:
Identify Negative Exponent: Write down the given expression and identify the negative exponent.The given expression is (−5y6)/((−3y−4)4). We need to simplify this expression and ensure that all exponents are positive.
Apply Power Rule: Apply the power rule to the denominator.When an exponent is raised to another exponent, we multiply the exponents. In this case, we have (−3y−4)4. We will apply the power rule to the y term.(-3y^{-4})^4 = (-3)^4 \times (y^{-4})^4\(\newline= 81 \times y^{-16}\)
Rewrite Negative Exponent: Rewrite the negative exponent as a positive exponent.To convert a negative exponent to a positive exponent, we take the reciprocal of the base. So, y−16 becomes 1/y16.81×y−16=81/y16
Combine Numerator and Denominator: Combine the numerator and the simplified denominator.Now we have the original numerator (−5y6) and the simplified denominator (81/y16). We will combine these to form a single fraction.(−5y6)/(81/y16)=(−5y6)∗(y16/81)
Multiply Terms with Same Base: Multiply the terms with the same base using the property of exponents.When multiplying terms with the same base, we add the exponents. In this case, we have y6×y16.(−5y6)×(y16/81)=(−5×y6+16)/81=(−5×y22)/81
Simplify Fraction: Simplify the fraction if possible.In this case, there are no common factors between the numerator and the denominator, so the fraction is already in its simplest form.81−5⋅y22
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