Answer:
a = 10
b = 6
Explanation:
(7^2 * 7^8) / 7^4 = 7^a / 7^4
7^2 * 7^8 = 7^10
7^10 / 7^4 = 7^a / 7^4
7^10 = 7^a
7^a / 7^4 = 7^b
7^10 / 7^4 = 7^10-4
7^6 = 7^b
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