Question

Tolong jawabbb inii berlaku sampai 20 detik

Answer 1

(a^-1 + b^-1) / (a^-2 + b^-2)
= (a^-1 + b^-1) / (a^-2 + b^-2) . a^2b^2/a^2b^2
= (ab^2 + a^2b) / (a^2 + b^2)
substitusi a = 2 dan b = 3,
= (2 . 3^2 + 2^2 . 3) / (2^2 + 3^2)
= (18 + 12) / (4 + 9)
= 30/13