Math

Question Simplify y143\sqrt[3]{y^{14}} by factoring, where yy is a positive real number and the radicand does not contain negative quantities raised to even powers.

Studdy Solution

STEP 1

Assumptions
1. The variable yy represents a positive real number.
2. The radicand does not contain negative quantities raised to even powers.
3. We are simplifying the expression y143\sqrt[3]{y^{14}} by factoring.

STEP 2

Identify the index of the radical and the exponent of the variable within the radicand. The index of the radical is 3 (since it is a cube root), and the exponent of the variable yy is 14.

STEP 3

To simplify the expression by factoring, we look for the highest power of yy that is a multiple of the index of the radical. In this case, we are looking for the highest power of yy that is a multiple of 3.

STEP 4

Since 14=3×4+214 = 3 \times 4 + 2, the highest power of yy that is a multiple of 3 and less than or equal to 14 is 3×4=123 \times 4 = 12. We can write y14y^{14} as y12y2y^{12} \cdot y^2.

STEP 5

Now we can rewrite the original expression using the factorization from the previous step.
y143=y12y23 \sqrt[3]{y^{14}} = \sqrt[3]{y^{12} \cdot y^2}

STEP 6

We can now separate the radical into two parts using the property of radicals that states abn=anbn\sqrt[n]{ab} = \sqrt[n]{a} \cdot \sqrt[n]{b}.
y12y23=y123y23 \sqrt[3]{y^{12} \cdot y^2} = \sqrt[3]{y^{12}} \cdot \sqrt[3]{y^2}

STEP 7

Since y12y^{12} is a perfect cube (because 1212 is a multiple of 33), we can simplify y123\sqrt[3]{y^{12}} to y4y^4.
y123=y4 \sqrt[3]{y^{12}} = y^4

STEP 8

The expression now simplifies to:
y4y23 y^4 \cdot \sqrt[3]{y^2}

STEP 9

This is the simplified form of the original expression by factoring. The final answer is:
y143=y4y23 \sqrt[3]{y^{14}} = y^4 \cdot \sqrt[3]{y^2}

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