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Help!!! What is the 7th term in the geometric sequence in which a10 is 9 and a13 is -72????????
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Help!!! What is the 7th term in the geometric sequence in which a10 is 9 and a13 is -72????????

User Nolawi
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a10 =9
a11= 9 x -2 = -18
a12= -18 x -2 = 36
a13 =36 x -2 = -72

multiplies by -2 every time
User Mykel Alvis
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