Algebra for all the Grades

We can use precalculus formulas for solving some problems,
Let us also know how to do algebra
Find the 11^th term of the sequence 4, 8, 12, 16, ….
Solution
Solve the following problem using the precalculus formulas

First term of the sequence, a₁ = 4
Difference of two successive terms, d = 8 - 4 = 4
n = 11
The formula to find the n^th term of an arithmetic sequence, a_n = a₁ + (n - 1)d
So, the 11^th term of the sequence 4, 8, 12, 16, …. = 4 + (11 - 1)4
= 4 + 10 * 4
= 4 + 40
= 44
So, the 11^th term of the sequence 4, 8, 12, 16, ….is 44.
Find more help with Precalculus help