Bagaimana cara mengerjakan ya ? trms.

3^-2 + 2^-3 = 1/3^2 + 1/2^3 = 1/9 + 1/8
= 8/72 + 9/72 = 17/72

[tex] \frac{1}{3 {}^{2} } + \frac{1}{2 {}^{3} } = \frac{1}{9} + \frac{1}{8} = \frac{8}{72} + \frac{9}{72} = \frac{17}{72} [/tex]
Jawaban : B. 17/72