Q. If a1=2 and an+1=(an)2−2 then find the value of a4.Answer:
Find a2: Use the given recursive formula to find a2. The recursive formula is an+1=(an)2−2. We know that a1=2. Calculate a2 using a1: a2=(a1)2−2=(2)2−2=4−2.
Find a3: Use the recursive formula to find a3. Now that we have a2, we can find a3 using the same formula: a3=(a2)2−2=(4)2−2=16−2.
Find a4: Use the recursive formula to find a4. With a3 found, we can calculate a4: a4=(a3)2−2=(16)2−2=256−2.