find the value of a25 - a15 for the AP:6,9,12,15
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Answered by
5
Step-by-step explanation:
a= 6,
d = 3
a25 = 6 + 24(3) = 78
a15 = 6 + 14(3) = 48
a25 - a15 = 78 - 48 = 30
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2
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