Through the point (5, 12) a straight line is drawn to meet X - axis at
A(x, 0) and Y - axis at B(0, y). Then we should have
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The sum of first 7 terms of an arithmetic sequence is 133 and the sum of first 15 terms is 525 a) find 4th term ? b) find the 8th term ? c) find the common difference ? d) write the sequence
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because
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