Question

Evaluate 1/x^-2 for x= 7.
-49
49
1/49
Please help
And thx but HURRY

Answer 1

49

Explanation:

Simplify the expression such that the variable has a positive exponent.

• 
  `(1)/(x^(-2) )`
• x² [negative exponent is taken to the other side]

Substitute x = 7.

• (7)²
• 49

Answer 2

Answer: 49

Explanation:

As we can see, we have been given a negative exponent for “x”. Hence we have to take the reciprocal which would be x squared.


Therefore, x = 7
= x^2 = 7 * 7
= 49