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Markylsd

  • 3 years ago

Prove 3n+ 20 < 3^n

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  1. nincompoop
    • 3 years ago
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    you can't prove it

  2. nincompoop
    • 3 years ago
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    it's not always the case

  3. mukushla
    • 3 years ago
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    its true for n>3 u may use mathematical induction, for n=4\[32<3^4=81\]now suppose that the statement is true for some n=k>4 this means\[3k+20<3^k\]and prove that for \(n=k+1\)\[3(k+1)+20<3^{k+1}\]i think u can do it from here :) let me know if this is unclear

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