To find an expression equivalent to 9^(-4), we need to understand negative exponents. It is equivalent to 1/(9^4), which is 1/6561.
Step-by-step explanation:
In order to find an expression equivalent to 9^(-4), we need to understand the concept of negative exponents. A negative exponent indicates the reciprocal of the corresponding positive exponent. So, in this case, 9^(-4) is equivalent to 1/(9^4). Now we can calculate 9^4 by multiplying 9 by itself four times: 9 * 9 * 9 * 9 = 6561. Therefore, 9^(-4) is equivalent to 1/6561.