Question

pls help me in this sum

Answer 1

-7+-5/2
-14+-5/2
-19/2

Answer 2

$a1 = - 7 \: \: \: \: and \: a2 = \frac{ - 5}{2} \\ d = a2 - a1 \\ \frac{ - 5}{2} - ( - 7) \\ \frac{ - 5}{2 } + 7 \\ \frac{ - 5 + 14}{2} \\ \frac{9}{2} \\ a3 = a \: + 2d = - 7 + 2( \frac{9}{2} ) = - 7 + 9 = 2 \: \\ answer \: is \: 2$
Answer is 2