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Question

Question 3 (ii)
In the following APs, find the missing term in the boxes.

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Solution

For the given A.P,a2=13 and a4=3

We know that,
a4=a2+d+d3=13+2d2d=313=10d=102=5

an=a+(n1)da2=a+(21)(5)13=a+(5)a=18

a3=18+(31)(5)=18+2(5)=1810=8

Therefore, the missing terms are 18 and 8 respectively.

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