Question

a=1and d=2,n=75 sn=n/2(2a+(n-1)d)sn=​

Answer 1

Answer:

Step-by-step explanation:

n=75 ,a=1, d=2

S₇₅=75/2 (2(1)+(75-1)2)

    =75/2 (2+148)

    =75*75

    =5625

Answer 2

Answer:

5625

Step-by-step explanation:

$\implies\frac{75}{2} (2 (1)+ (75 - 1)2) \\\\ \implies\frac{75}{2} (150) \\\\ \implies {75}^{2} \\\\ \implies5625 \\ \\ \sf \: therefore \: s_{n} = 5625$

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