Answer: 7th term in the sequence is 729.
Step-by-step explanation:
The given sequence is a geometric sequence with the first term being 1 and the common ratio being -3.
To find the 7th term, we can use the formula for the nth term of a geometric sequence:
a_n = a_1 * r^(n-1)
where a_1 is the first term, r is the common ratio, and n is the term number we want to find.
Plugging in the values we have, we get:
a_7 = 1 * (-3)^(7-1)
= 1 * (-3)^6
= 1 * 729
= 729