The first two terms of the arithmetic sequence are given.Find the indicated term.? $a _ { 1 } = - 1 , a _ { 2 } = 6 , a _ { 11 } =\square$ ?
A)-3
B)69
C)76
D)83
E)-4

Question

Quizplus · Accepted Answer

The common difference $d$ in the arithmetic sequence can be found by subtracting the first term from the second term: $d = a_2 - a_1 = 6 - (-1) = 7$. To find the 11th term, use the formula $a_n = a_1 + (n - 1)d$, where $n$ is the term number. Thus, $a_{11} = -1 + (11 - 1) \times 7 = -1 + 10 \times 7 = -1 + 70 = 69$.

The First Two Terms of the Arithmetic Sequence Are Given a1=−1,a2=6,a11=□a _ { 1 } = - 1 , a _ { 2 } = 6 , a _ { 11 } =\squarea1​=−1,a2​=6,a11​=□

The First Two Terms of the Arithmetic Sequence Are Given $a _ { 1 } = - 1 , a _ { 2 } = 6 , a _ { 11 } =\square$