Advanced MathVery hardEquating powers of 4 and 2
Advanced Math practice question
If 4ˣ = 2^(x + 3), what is the value of x?
Answer: 3
4ˣ = 2^(2x), so 2x = x + 3 and x = 3.
Common wrong answers
- If you answered 6
- 6 doubles 3.
- If you answered 1.5
- 1.5 halves 3, dividing instead of subtracting.
- If you answered -3
- −3 has the sign wrong.
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