The functions 𝑔 and ℎ are given by 𝑔(𝑥)=log4(2𝑥) ℎ(𝑥)=(𝑒𝑥)5𝑒(1/4).(i) Solve 𝑔(𝑥)=3 for values of 𝑥 in the domain of 𝑔.(ii) Solve ℎ(𝑥)=𝑒(1/2) for values of 𝑥 in the domain of ℎ.
Question
The functions 𝑔 and ℎ are given by 𝑔(𝑥)=log4(2𝑥) ℎ(𝑥)=(𝑒𝑥)5𝑒(1/4).(i) Solve 𝑔(𝑥)=3 for values of 𝑥 in the domain of 𝑔.(ii) Solve ℎ(𝑥)=𝑒(1/2) for values of 𝑥 in the domain of ℎ.
Solution
(i) To solve the equation g(x) = 3, we first substitute g(x) with its definition, which gives us log4(2x) = 3. The logarithmic equation can be rewritten in exponential form as 4^3 = 2x. Simplifying this gives 64 = 2x. Dividing both sides by 2, we find that x = 32.
(ii) To solve the equation h(x) = e^(1/2), we first substitute h(x) with its definition, which gives us (e^x)^5 * e^(1/4) = e^(1/2). Simplifying the left side gives us e^(5x + 1/4) = e^(1/2). Since the bases are equal (both are e), we can set the exponents equal to each other, which gives us 5x + 1/4 = 1/2. Solving for x, we subtract 1/4 from both sides to get 5x = 1/4, and then divide by 5 to find that x = 1/20.
Similar Questions
The functions 𝑔 and ℎ are given by 𝑔(𝑥)=log5(4𝑥-2) ℎ(𝑥)=sin-1(8𝑥).(i) Solve 𝑔(𝑥)=3 for values of 𝑥 in the domain of 𝑔.(ii) Solve ℎ(𝑥)=𝜋4 for values of 𝑥 in the domain of ℎ.
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Select the correct answer.Which function defines (𝑔⋅𝑓)(𝑥) ?𝑓(𝑥)=log(5𝑥)𝑔(𝑥)=5𝑥+4 A. (𝑔⋅𝑓)(𝑥)=5𝑥log(5𝑥)+4 B. (𝑔⋅𝑓)(𝑥)=5𝑥+4+log(5𝑥) C. (𝑔⋅𝑓)(𝑥)=5𝑥−4−log(5𝑥) D. (𝑔⋅𝑓)(𝑥)=5𝑥log(5𝑥)+4log(5𝑥)
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