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notka56 [123]
3 years ago
14

I will give brainliest Show work please

Mathematics
2 answers:
swat323 years ago
7 0

Answer:

  • n = 10

Step-by-step explanation:

  • 4^8/(4^2)^-3 ÷ 4^4 = 4^n
  • 4^8/4^-6 ÷ 4^4 = 4^n
  • 4^(8 - (-6) - 4) = 4^n
  • 4^10 = 4^n
  • 10 = n
  • n = 10
mafiozo [28]3 years ago
7 0

To Find :

  • value of n

<h2>Solution :</h2>

\sf \dashrightarrow \:  \frac{4 {}^{8} }{(4 {}^{2} {)}^{ - 3}  }  \div  {4}^{4}  = 4 {}^{n}  \\  \\ \sf \dashrightarrow \:  \frac{4 {}^{8} }{ {4}^{ - 6} }  \div  {4}^{4}  = 4 {}^{n}  \\  \\ \sf \dashrightarrow \:  {4}^{8 - ( - 6)}  \div  {4}^{4}  =  {4}^{n}  \\  \\ \sf \dashrightarrow \:  {4}^{8 + 6} \div  {4}^{4}  =  {4}^{n}  \\  \\ \sf \dashrightarrow \: {4}^{14}  \div  {4}^{4}  =  {4}^{n}  \\  \\ \sf \dashrightarrow \: {4}^{14 - 4}  =  {4}^{n}  \\  \\ \sf \dashrightarrow \: {4}^{10}  = 4 {}^{n}  \\  \\   \red{\boxed{ \bf \: n = 10}}

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Penelope determined the solutions of the quadratic function by completing the square. F(x) = 4x2 8x 1 –1 = 4x2 8x –1 = 4(x2 2x)
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By solving the quadratic equation using completing the square method we got that Penelope should have added 4 to both sides instead of adding 1.

<h3>What is quadratic equation ?</h3>

Any equation of the form ax^2+bx+c=0 where x is variable and a, b, and c are any real numbers where a ≠ 0 is called quadratic equation .

Given work of Penelope is

$$\begin{aligned}&f(x)=4 x^{2}+8 x+1 \\&-1=4 x^{2}+8 x \\&-1=4\left(x^{2}+2 x\right) \\&-1+1=4\left(x^{2}+2 x+1\right) \\&0=4(x+2)^{2} \\&0=(x+2)^{2} \\&0=x+2 \\&-2=x\end{aligned}$$

Now we can see that Penelope determined the solutions of the quadratic function by completing the square. so he must have been done as following

$$\begin{aligned}&f(x)=4 x^{2}+8 x+1 \\&-1=4 x^{2}+8 x \\&-1=4\left(x^{2}+2 x\right) \\&-1+4=4\left(x^{2}+2 x+1\right) \\&3=4(x+2)^{2} \\&\frac{3}{4} =x+2)^{2} \\&\frac{\pm\sqrt3}{2} =x+2 \\&\frac{-2\pm\sqrt3}{2} =x\end{aligned}$$

By solving the quadratic equation using completing the square method we got that Penelope should have added 4 to both sides instead of adding 1.

To learn more about quadratic equations visit : brainly.com/question/1214333

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Step-by-step explanation:

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