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Find the 18th arithmetic sequence when a1=-4 and d=6
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Find the 18th arithmetic sequence when a1=-4 and d=6

User Karri
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a_n=a_1+(n-1)d\\\\a_1=-4;\ d=6\\\\substitute\\\\a_n=-4+(n-1)\cdot6=-4+6n-6=6n-10\\\\a_(18)=6\cdot18-10=108-10=98
User Ostad
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