Question 1035632
Which expressions are equivalent to the one below? Check all that apply.
81^x
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Evaluate each one.
Mutliplying --> adding exponents
a. 9^2*9^x = 9^(x+2) NG
b. 9*9^x = 9^1*9^x = 9^(x+1) NG
c.9^x*9^x = 9^(x+x) = 9^2x
Multiplying exponents --> raising to the power.
 = (9^2)^x = 81^x is equal.
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d.9^2x ... same as c.
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e. 9*9^2x = 9^(2x+1) NG
f.(9*9)^x = 81^x is equal
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Is that clear?  It's important to understand this.  It only gets worse.