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What is the position and nature of image formed by lens combination shown in figure ? (f 1 , f 2 are focal lengths) O 20 cm 2 cm A B f 1 = + 5 cm f 2 = – 5 cm

1. 3 20 cm from point B at right, real
2. 70 cm from point B at right ; real
3. 40 cm from point B at right ; real
4. 70 cm from point B at left ; virtual

Correct answer: 70 cm from point B at right ; real

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