Question

Find the 43rd term of -12,-6,0,6,12

Answer 1

240

Explanation:

This is an arithmetic sequence. Find the first term and the common difference from the given sequence.

First term = a = -12

Common difference = second term - first term

= -6 - (-12)

= -6 + 12

d = 6

n = 43

`\boxed{\bf n^(th) \ term = a + (n -1)*d}`

= -12 + (43 -1) * 6

= -12 + 42 *6

= -12 + 252

= 240