Sendo x = 7º• 7 elevado a 1 + 7 elevado a 4: 7 elevado a 2 e y = 4 elevado a 1 + (4 elevado a 3 • 4) : 4 elevado a 2 calcule o valor de 7x + 4y
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x = 7º• 7 elevado a 1 + 7 elevado a 4: 7 elevado a 2
x = 7º• 7^1 + 7^4 ==> 7^(0+1) + 7^4 = 7^1 + 7^(4-2) = 7+7^2 = 7+49 = 56
7^2 7^2
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y = 4 elevado a 1 + (4 elevado a 3 • 4) : 4 elevado a 2 calcule o valor de 7x + 4y
y = 4^1 + (4^• 4) : 4^2 => 4 + (4^4) ==> 4 + 4^(4-2) ^==> 4+4^2 = 4+ 16 = 20
4^2
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calcule o valor de 7x + 4y
7x + 4y = 7.56 + 4.20 ==> 392+80 ==> 472