December 2018 2 43 Report
Jarak antara benda dan bayangan (nyata diperbesar dan di depan cermin) dalam suatu cermin cekung adalah 20 cm jika jarak focus cermin 7,5 cm. maka letak bayangan di depan cermin?
a. 30
b. 20
c. 15
d. 10
e. 5

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