Question

Jika a=2 dan b=3 maka berapa kah hasil dari a^-1 + b^-1/ a^-2 + b^-2?

Answer 1

(a⁻¹ + b⁻¹) / (a⁻² + b⁻²) = (2⁻¹ + 3⁻¹) / (2⁻² + 3⁻²)
= (1/2 + 1/3)/(1/2² + 1/3²)
= (1/2 + 1/3)/(1/4 + 1/9)
= (5/6)/(13/36)
= (5×36)/(6×13)
= 180/78
= 30/13