Question

Please help me on my question I need help on. 2

Answer 1

Given for question 2:

`a=-7,r=-4`

The general form of the geometric sequence is:

`a_n=a_1\cdot r^(n-1)`

substitute with the given values of a and r:

`a_n=(-7)\cdot(-4)^(n-1)`

To find the fourth term, substitute with n = 4

so, the fourth term will be:

`\begin{gathered} a_4=(-7)\cdot(-4)^(4-1) \\ a_4=(-7)\cdot(-4)^3 \\ a_4=-7\cdot(-64) \\ a_4=448 \end{gathered}`

so, the answer will be the fourth term = 448