Penjelasan:
1/s' = 1/f - 1/s
1/s' = 1/20 - 1/12
1/s' = 3/60 - 4/60
1/s' = -1/60
s' = -60
sifat bayangan :
" Life is not a problem to be solved but a reality to be experienced! "
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Penjelasan:
1/s' = 1/f - 1/s
1/s' = 1/20 - 1/12
1/s' = 3/60 - 4/60
1/s' = -1/60
s' = -60
sifat bayangan :