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ivano_logy

  • 3 years ago

If 4^y=7, then the value of 4^3y+2 is?

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  1. ash2326
    • 3 years ago
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    \[4^y=7\] \[4^{3y}=(4^y)^3\] So you'll get \[\large 4^{3y}=7^3\] Can you solve now?

  2. ivano_logy
    • 3 years ago
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    343 Thank you:)

  3. jim_thompson5910
    • 3 years ago
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    343 isn't the final answer, but it gets you there

  4. ivano_logy
    • 3 years ago
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    343+2=345

  5. jim_thompson5910
    • 3 years ago
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    is the +2 in the exponent when you say 4^3y+2 ie is the problem \[\Large 4^{3y+2}\] or is it \[\Large 4^{3y}+2\]

  6. jim_thompson5910
    • 3 years ago
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    if it's the second one, then you're correct

  7. ivano_logy
    • 3 years ago
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    It's the second one 4^(3y)+2

  8. jim_thompson5910
    • 3 years ago
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    ok then you got it, just making sure

  9. ivano_logy
    • 3 years ago
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    Nice, thank you!

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