Math Problem Statement

函数y=log_1/3 (2^x+1)的值域为

Solution

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Math Problem Analysis

Mathematical Concepts

Logarithmic Functions
Exponential Functions
Function Domains and Ranges

Formulas

y = log_b(x)
2^x + 1
log_b(x) for b ∈ (0,1)

Theorems

Properties of Logarithms
Decreasing Nature of Logarithmic Functions with Base < 1

Suitable Grade Level

Grades 10-12