Question

Plz answer this question ASAP

Answer 1

Step-by-step explanation:

SN / AP

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Answer 2

Step-by-step explanation:

Given that,

$s_{n} = 3n + 2 {n}^{2} \\ s_{1} = 3 \times 1 + 2 \times {1}^{2} \\ s_{1} = 5 = t_{1} \\ s_{2} = 3n + 2 {n}^{2} \\ = 3 \times2 + 2 \times {2}^{2} \\ s_{2} = 14 = t_{1} + t_{2} \\ s_{2} - s_{1} = 9 \\ d= t_{2} - t_{1} \\ d = 9 - 5 = 4$