Find the divisor that links the known terms, then apply it to all unknown terms.<br><br>
&bull; The first term changes from 100 to 50: 100 ÷ 2 = 50 (divide by 2).<br>
&bull; Second term: 50 ÷ 2 = 25<br>
&bull; Third term: 60 ÷ 2 = 30<br>
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Final Answer: A = 25, B = 30