September 2018 1 43 Report
Sebuah cermin cekung mempunyai fokus 10 cm. agar dihasilkan bayangan nyata dan diperbesar 4 kali, maka benda harus diletakkan didepan cermin pada jarak..
a. 2,5 cm
b. 5 cm
c. 7,5 cm
d. 10 cm
e. 12,5 cm

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