15th term of AP

What is the 15th term; x1=1.5, d=4.5?

Correct answer:

x₁₅ =  64.5

Step-by-step explanation:

$$\begin{gathered} x_1=1.5 \\ d=4.5 \\ n=15 \\ {x}_{15}=x_1+(n-1)\cdot d=1.5+(15-1)\cdot 4.5=64.5 \end{gathered}$$

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