Help mee kaaaaaaaaaakkkkkkkkkkkkkkkkkkkkkkkkk

Jawaban:

1/f = 1/s + 1/s'

(karena cermin cembung jadi titik fokusnya negatif)

-1/30 = 1/20 + 1/s'

1/s' = -1/30 – 1/20

       = -2/60 – 3/60

       = -5/60

s' = -12 cm

Penjelasan:

#NoCopas

#NoGoogle

#AnsweByZaidan

#SemangatBelajar