Question

Solve the equation without using a calculator. $7^{x}=343$

Solution

VerifiedAnswered 1 year ago

Answered 1 year ago

Step 1

1 of 3To solve the given equation, we will use elementary exponential rules and the fact that the exponential function is one-to-one. The function $f(x)=c^x$ will be one-to-one, if the following implication stands:

$c^a=c^b\quad\Rightarrow\quad a=b.$

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