Question 956410

{{{(7^2)^x=1}}}...... exponent rule: Whenever you have an exponent expression that is raised to a power, you can multiply the exponent and power

{{{7^(2x)=1}}}.....one other rule states anything to the power zero is just "{{{1}}}"

since your exponent is {{{2x}}}, it will be equal to zero only
 if only {{{x=0}}}

so,{{{7^(2*0)=7^0=1}}}