← Concept directoryAnswers for “为什么证明 $-\frac{2}{3}a_n+\frac{1}{3}\le0$ 归结为已知的界 $a_n\ge\frac{1}{2}$？”
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Find a method↗ Subtract an from both sides of the recurrence relation. Distribute the 31 and combine like terms to simplify the expression to −32an+31.
Conditions: The recurrence relation is an+1=31(an+1).; The goal is to analyze the sign of the difference to determine monotonicity.
Subtract an from both sides of the recurrence relation. Distribute the 31 and combine like terms to simplify the expression to −32an+31.
Conditions: The recurrence relation is an+1=31(an+1).; The goal is to analyze the sign of the difference to determine monotonicity.