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The fourth and eight terms of an A.P. ar...

The fourth and eight terms of an A.P. are in the ratio of `1:2` and tenth term is 30. Find the common difference.

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The correct Answer is:
The A.P. is `3,3 + 3, 3 + (2 xx 3) , 3 + (3 xx 3) , .., ` i.e. `, 3,6, 9,12, ….`
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