Question

Find the sum integers between 100 and 300 that are divisible by 9 not divisible by 9. who answers first is the brainliest

Answer 1

$\:\: \underline{\underline{\bf{\large\mathfrak{~~solution~~}}}}$

❒

the integers between 100 to 300 that are divisible by 9 are......

108,117,126,135,...........,297

[as,,100/9=11.1....so.....12×9=108(lowest number)......and..300/9=33.3....so...33×9=297(biggest number within 300 which is divisible by 9)]

therefore......

first term(a)=108

difference (d)=9

let ...297 is the n th term....

$= > 297 = 108 + (n - 1)9 = > 297 - 108 + 9 = 9n \\ = > n = 22$

now the sum of 22 terms....

$= > s(22) = \frac{22(108 + 297)}{2} \\ = > s(22) = 4455$

Answer=4455

Answer 2

Step-by-step explanation:

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