Q. Express the following fraction in simplest form, only using positive exponents.−5(j−1)3−2j9Answer:
Write & Identify Negative Exponent: Write down the given expression and identify the negative exponent.The given expression is (−2j9)/(−5(j−1)3).We need to simplify this expression and express it with only positive exponents.
Simplify Denominator: Simplify the denominator.The denominator is −5(j−1)3. We need to apply the power to a power rule, which states that (am)n=am∗n.So, (j−1)3=j−1∗3=j−3.Now the expression becomes (−2j9)/(−5j−3).
Convert Negative to Positive Exponent: Convert the negative exponent to a positive exponent.To convert a negative exponent to a positive exponent, we use the rule that a−n=an1.So, j−3=j31.Now the expression becomes −5×j31−2j9.
Multiply by Reciprocal: Multiply the numerator by the reciprocal of the denominator.To divide by a fraction, we multiply by its reciprocal. So we multiply −2j9 by the reciprocal of −5×j31, which is −5j31.The expression becomes (−2j9)×(−5j31).
Simplify by Multiplying Numerators: Simplify the expression by multiplying the numerators and denominators.When we multiply fractions, we multiply the numerators together and the denominators together.The expression becomes (−2×−1)×(j9/(5j3)).
Simplify Constants & Apply Quotient Rule: Simplify the constants and apply the quotient rule for exponents.The constants simplify to 2×1=2.The quotient rule for exponents states that a(m)/a(n)=a(m−n) when m > n.So, j(9)/j(3)=j(9−3)=j(6).Now the expression becomes 2×j(6)/5.
Write Final Simplified Expression: Write the final simplified expression.The final simplified expression is 52j6.
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