December 2018 1 9 Report
1. Benda setinggi 2 cm depan lensa cekung sejauh 15 cm , bila focus lensa 30 cm , jarak bayangan yang terbentuk ............
a. 20 cm
b. -20 cm
c. 10 cm
d. -10 cm
Paki rumus dan penjelasan yang lebih mengerti ....

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