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Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

Write the equations in logarithmic form 7^3=343