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01-03-2020
Mathematics

contestada

Evaluate 1/x^-2 for x =7
0-49
1/49
49

Respuesta :

calculista calculista

09-03-2020

Answer:

49

Step-by-step explanation:

we have

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

Remember the property of exponents

[tex]\frac{1}{a^{-n}}=a^n[/tex]

so

[tex]\frac{1}{x^{-2}}=x^2[/tex]

For x=7

substitute the value of x in the expression above

[tex]7^2=49[/tex]

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