Step 1: Calculate the image distance for the first lens using the lens formula:
\[
\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}
\]
Given \(f = 25\) cm, \(d_o = -19\) cm, and solving for \(d_i\):
\[
\frac{1}{25} = \frac{1}{-19} + \frac{1}{d_i}
\]
\[
\frac{1}{d_i}
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