Question

Find a30 – a20 for the A.P.
(i) -9, -14, -19, -24,

Answer 1

Answer:

-49

Step-by-step explanation:

a30=-9+(30-1)-5

=-9-145=-153

a20=-9+(20-1)-5

=-9-95=-104

a30-a20=-153+104=-49

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Hope it helps