Math, asked by cbhaskarreddy, 10 months ago

given d= 5, and s9= 75 find a and a9
question from ap chapter
answer it fast ​

Answers

Answered by keiraanglebrandt
1

Step-by-step explanation:

D = 5. S9 = 75. By applying the formula. Sn = n / 2 + ( 2a + ( n - 1 ) × d 75 = 9 / 2 + (2a + ( 9 - 1 ) × 5 75 = 9 / 2 + ( 2a + 40 ) 75 × 2 / 9 = 2a + 40

Answered by ronaldoChristiano
2

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