Q. If a1=3 and an+1=3an+5 then find the value of a4.Answer:
Given terms: We are given the first term of the sequence, a1=3, and the recursive formula for the sequence, an+1=3an+5. To find a4, we need to find a2, a3, and then a4 using the recursive formula.
Find a2: First, let's find a2 using the recursive formula:a2=3a1+5a2=3×3+5a2=9+5a2=14
Find a3: Next, we'll find a3 using the recursive formula and the value of a2 we just found:a3=3a2+5a3=3×14+5a3=42+5a3=47
Find a4: Finally, we'll find a4 using the recursive formula and the value of a3:a4=3a3+5a4=3×47+5a4=141+5a4=146
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