n(n+2) (n+3)(n+5) =72.
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72n+23n−3.3n−1 is divisible by 25 for any natural number n≥1. Prove that by mathematical. EASY. Answer. Step 1. Check if P(i) is correct. We get P(1)=72+20×30=49+1=50.
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Step 1. Check if P(i) is correctWe get P(1) = 72 + 20 × 30 = 49 + 1 = 50 Which is divisible by 25 So P(1) is true.Step 2. Let P(K) is true, which means ... More
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