6.find the 9th term of the sequence described by :A(n)=7+(n-1)(3). A)42 B)9 C)31 D)27 7.What is the function for the arithmetic sequence 2,7,12,17,22. A) A(n)=5+(n-1)(2) B) A(n)=2+(n-1)(6) C) A(n)=5(6) D A(n)=2+(n-1)(5)

Question

6.find the 9th term of the sequence described by :A(n)=7+(n-1)(3). A)42  B)9  C)31  D)27                  7.What is the function for the arithmetic sequence 2,7,12,17,22. A) A(n)=5+(n-1)(2)  B) A(n)=2+(n-1)(6)  C) A(n)=5(6)  D A(n)=2+(n-1)(5)

mathmath333 · Answer

$\large\tt \color{black}{A(n)=7+(n-1)(3)}$

$\large\tt \color{black}{put~~n=9}$

mathmath333 · Answer

$\large\tt \color{black}{2,7,12,17,22}$

$\large\tt \color{black}{a=2,d=7-2=12-7=17-12=5,}$

$\large\tt \color{black}{A(n)=a+(n-1)(d)}$

anonymous · Answer

so 6. is B?
and 7. is D?

mathmath333 · Answer

7. is correct

mathmath333 · Answer

u should recalculate 6

anonymous · Answer

oh ok so its C 31 if you plug in 9 in the for the n so its 7+(9-1)(3)=31 right?

mathmath333 · Answer

yes of cos

anonymous · Answer

ok thank you so much  for all of you help

mathmath333 · Answer

$\Huge\color{blue}{\ddot\smile}$