Question

Fin find the 31st term in -3, -5, -7, -9

Answer 1

Answer:

-63

Find common difference:

• -5 -(-3)

• -5 + 3

• -2

nth term:

• a + (n-1)(d)      [where a is first term, d is common difference]

• -3 + (n-1)(-2)

• -3 -2n + 2

• -2n -1

So 31st term:

• -2(31) -1

• -63