Question

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1. Find the sum of the following APs:
(i) 2,7, 12, ..., to 10 terms.
(iii) 0.6, 1.7, 2.8. ..., to 100 terms.
Pind the cums given below​

Answer 1

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1) a = 2

d = 5

$a_{10} = a + 9d$

= 2 + 9×5

= 47

2) a = 0.6

d = 1.1

$a_{100} = a + 99d$

= 0.6 + 99×1.1

= 109.5

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