anonymous
  • anonymous
If 4^y=7, then the value of 4^3y+2 is?
Mathematics
chestercat
  • chestercat
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ash2326
  • ash2326
\[4^y=7\] \[4^{3y}=(4^y)^3\] So you'll get \[\large 4^{3y}=7^3\] Can you solve now?
anonymous
  • anonymous
343 Thank you:)
jim_thompson5910
  • jim_thompson5910
343 isn't the final answer, but it gets you there

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anonymous
  • anonymous
343+2=345
jim_thompson5910
  • jim_thompson5910
is the +2 in the exponent when you say 4^3y+2 ie is the problem \[\Large 4^{3y+2}\] or is it \[\Large 4^{3y}+2\]
jim_thompson5910
  • jim_thompson5910
if it's the second one, then you're correct
anonymous
  • anonymous
It's the second one 4^(3y)+2
jim_thompson5910
  • jim_thompson5910
ok then you got it, just making sure
anonymous
  • anonymous
Nice, thank you!

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