4. Using a geometric series, write 0.38 fraction). = 0.38383838... as a rational number (i.e. a...

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4. Using a geometric series, write 0.38 fraction). = 0.38383838... as a rational number (i.e. a proper 3 marks 5. Using an appropriate combination C, what is the coefficient of a in the expansion of (5-2x)"? Note: You do not have to write out the full expansion to get the answer. 2 marks 4. Using a geometric series, write 0.38 fraction). = 0.38383838... as a rational number (i.e. a proper 3 marks 5. Using an appropriate combination C, what is the coefficient of a in the expansion of (5-2x)"? Note: You do not have to write out the full expansion to get the answer. 2 marks

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4 Writing 038383838 as a geometric series Let x 038 which means multiplying x by 100 gives us 38 So ... View the full answer