Two lenses of focal length f1 and f2 are kept in contact coaxially. The power of the combination will be |
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(a) |
|
(b) |
|
(c) |
|
(d) |
|
Two lenses of focal length f1 and f2 are kept in contact coaxially. The power of the combination will be |
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(a) |
|
(b) |
|
(c) |
|
(d) |
|
In the question given below, there is a number series with one term missing shown by “?”. The term is given as one of the alternatives among four options given below it. Find the term.
10, 19, 40, 77, 158, ? |
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(a) |
311 |
(b) |
307 |
(c) |
301 |
(d) |
299 |
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