Question

find S10 for an AP a=10,d=3​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

S_n = n[2a + (n-1)d] / 2

S_10 = 10[20 + 9*3]/2

S_10 = 10[47] / 2

S_10 = 470/2

S_10 = 235