Q. If a1=2,a2=0 and an=an−1−an−2 then find the value of a4.Answer:
Calculate a3: To find the value of a4, we need to use the recursive formula an=an−1−an−2. We already know a1 and a2, so we can calculate a3 first.a3=a2−a1=0−2=−2.
Calculate a4: Now that we have a3, we can use it along with a2 to find a4.a4=a3−a2=−2−0=−2.
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