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6.1 Given: $g(x) = 3^x$ 6.1.1 Write down the equation of $g^{-1}$ in the form $y = ...$ 6.1.2 Point $P(6 ; 11)$ lies on $h(x) = 3^{x - 4} + 2$ - NSC Mathematics - Question 6 - 2021 - Paper 1

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6.1-Given:-$g(x)-=-3^x$----6.1.1-Write-down-the-equation-of-$g^{-1}$-in-the-form-$y-=-...$----6.1.2-Point-$P(6-;-11)$-lies-on-$h(x)-=-3^{x---4}-+-2$-NSC Mathematics-Question 6-2021-Paper 1.png

6.1 Given: $g(x) = 3^x$ 6.1.1 Write down the equation of $g^{-1}$ in the form $y = ...$ 6.1.2 Point $P(6 ; 11)$ lies on $h(x) = 3^{x - 4} + 2$. The graph of $h... show full transcript

Worked Solution & Example Answer:6.1 Given: $g(x) = 3^x$ 6.1.1 Write down the equation of $g^{-1}$ in the form $y = ...$ 6.1.2 Point $P(6 ; 11)$ lies on $h(x) = 3^{x - 4} + 2$ - NSC Mathematics - Question 6 - 2021 - Paper 1

Step 1

Write down the equation of $g^{-1}$ in the form $y = ...$

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Answer

To find the inverse of the function g(x)=3xg(x) = 3^x, we need to swap xx and yy and solve for yy. This gives us the equation:
oldsymbol{y = ext{log}_3(x)}.

Step 2

Point $P(6 ; 11)$ lies on $h(x) = 3^{x - 4} + 2$. Write down the coordinates of the image of $P$ on $g$

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Answer

The point P(6;11)P(6 ; 11) can be transformed to find the corresponding coordinates on the graph of gg.
First, we calculate the translation:

  • Move 4 units left: New x-coordinate =64=2= 6 - 4 = 2.
  • Then add 2: New y-coordinate =112=9= 11 - 2 = 9.
    Thus, the coordinates of the image of PP on gg are (2,9)(2, 9).

Step 3

Determine the values of $p$ and $q$

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Answer

We know that the asymptote of the function f(x)=2px+qf(x) = 2^{p}*x + q is y=16y = -16. This asymptote indicates the value of qq. Therefore, we have:
q=16q = -16.
To find pp, substitute the point T(3;16)T(3 ; 16) into the function:
16=2p3+q16 = 2^{p}*3 + q
Substituting for qq:
16=2p31616 = 2^{p}*3 - 16
Now, rearranging gives:
32=2p332 = 2^{p}*3
Thus,
2^{p} = rac{32}{3}
To find pp, we can convert 3232 to a power of 22:
32=2532 = 2^5
This implies:
2p=25extlog2(3)2^{p} = 2^{5 - ext{log}_2(3)}
Therefore,
pextisapproximately5extlog2(3)extorp=2p ext{ is approximately } 5 - ext{log}_2(3) ext{ or } p = 2.

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