What is the position of the image what is the total focus


The optical device consists of two lenses with focal points f1 = 1 m and f2 = 1.5 m which are L = 20 cm apart. We place an object 5 m on the left from the device. What is the position of the image? What is the total focus length ftot of this device? 

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Physics: What is the position of the image what is the total focus
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