. In an AP the difference between the 8th and 4th terms is 20 and...
. In an AP the difference between the 8th and 4th terms is 20 and...
. In an AP the difference between the 8th and 4th terms is 20 and the 8th
term is 1 ½ times the 4th term. What is the (a) common difference (b) first
term of the sequence?
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