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The fourth and ninth terms of an arithmetic progression are -3 and 12 respectively. Find the:
1) common difference
2) fifth term
3) number of term which will give a sum of 135
2 years ago

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Question

The fourth and ninth terms of an arithmetic progression are -3 and 12 respectively. Find the:
1) common difference
2) fifth term
3) number of term which will give a sum of 135

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