Given the expression:

[tex]\[ \frac{\sqrt{a} \times a}{a^{-2}} \][/tex]

Rewrite the expression in the form [tex]\( a^k \)[/tex].

Find the value of [tex]\( k \)[/tex].



Answer :

To express the given expression [tex]\(\frac{\sqrt{a} \times a}{a^{-2}}\)[/tex] in the form [tex]\(a^k\)[/tex] and find the value of [tex]\(k\)[/tex], we can follow a series of algebraic steps to simplify it.

Let's start with the original expression:

[tex]\[ \frac{\sqrt{a} \times a}{a^{-2}} \][/tex]

First, recognize that [tex]\(\sqrt{a}\)[/tex] can be written as a power of [tex]\(a\)[/tex]. Specifically, [tex]\(\sqrt{a}\)[/tex] is the same as [tex]\(a^{1/2}\)[/tex]. So, we can rewrite the expression as:

[tex]\[ \frac{a^{1/2} \times a}{a^{-2}} \][/tex]

Next, simplify the product in the numerator. Recall that when multiplying powers with the same base, you add the exponents:

[tex]\[ a^{1/2} \times a = a^{1/2 + 1} = a^{1.5} \quad \text{(since } 1/2 + 1 = 1.5\text{)} \][/tex]

Now, substitute this back into the expression:

[tex]\[ \frac{a^{1.5}}{a^{-2}} \][/tex]

To simplify the division of powers with the same base, subtract the exponents:

[tex]\[ a^{1.5} \div a^{-2} = a^{1.5 - (-2)} = a^{1.5 + 2} = a^{3.5} \][/tex]

Thus, the simplified expression can be written as [tex]\(a^{3.5}\)[/tex].

Comparing this with the form [tex]\(a^k\)[/tex], we see that:

[tex]\[ k = 3.5 \][/tex]

Therefore, the value of [tex]\(k\)[/tex] is:

[tex]\[ \boxed{3.5} \][/tex]