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I really need help with this Arithmetic sequence question! anyone who can help me! I BLESS YOU ABUNDANTLY! ​
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I really need help with this Arithmetic sequence question! anyone who can help me! I BLESS YOU ABUNDANTLY! ​

I really need help with this Arithmetic sequence question! anyone who can help me-example-1
User Dave Novelli
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1 Answer

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t_(11)=29\\t_(15)=49\\\\t_n=t_1+(n-1)d\\\\29=t_1+(11-1)d\\49=t_1+(15-1)d\\\\t_1+10d=29\\t_1+14d=49

Subtracting the first equation from the second one, we get:


4d=20\\d=5


t_1+10\cdot5=29\\t_1=29-50\\t_1=-21

Therefore


t_1=-21\\t_2=-21+5=-16\\t_3=-16+5=-11\\t_4=-11+5=-6

User Teefour
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