Which are true of the function f of x is equal to 49 times 1 seventh to the x th power ? Choose three correct answers.

For every real x, 49(1/7)^x is positive, so the range is y > 0 (A). Increasing x by 1 multiplies the function value by 1/7, so each value is one-seventh of the previous one (B). Exponential functions of this form are defined for every real x, making the domain all real numbers (E).

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