JBJ323 JBJ323
  • 17-12-2020
  • Mathematics
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Find the value of x if 9^1/2 • 9^1/2 = x^√81

Find the value of x if 912 912 x81 class=

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2002898 2002898
  • 17-12-2020

Answer:

(√9)^2x-1/2 = 1/81

3^2x-1/2 = 1/(3)⁴. (as √9 = 3)

3^2x-1/2 = 3^-⁴. (as 1/a^m = a^-m)

as base are equal exponents are equal

so 3 gets cancelled out

2x-1/2 = -4

(4x-1)/2 = -4

4x-1 = -8

x = -7/4

hope this helps

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