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Can anyone help, A level maths logs

Can anyone help, A level maths logs-example-1
User Bartlomiej
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Answer:

To solve the equation (log3 x)^2 - 4 log3 x + 3 = 0, let's make a substitution.

Let's assume log3 x = y, such that x = 3^y.

Now, substitute this value back into the equation:

(y)^2 - 4(y) + 3 = 0.

To solve this quadratic equation, we can factor it:

(y - 1)(y - 3) = 0.

Setting each factor equal to zero gives us:

y - 1 = 0 or y - 3 = 0.

For y - 1 = 0,

y = 1.

Substituting y = 1 back into our assumption, we get:

log3 x = 1.

Now, let's solve for x:

x = 3^(1).

x = 3.

For y - 3 = 0,

y = 3.

Substituting y = 3 back into our assumption, we get:

log3 x = 3.

Now, let's solve for x:

x = 3^(3).

x = 27.

So the solutions to the equation are x = 3 and x = 27.

Explanation:

User Saehun Sean Oh
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