04. Ms Bushra opened the book, added the page numbers in front of her and got 351. Which page
numbers are in front of her?
Answers
Answered by
1
Answer:
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Step-by-step explanation:
Answered by
1
Answer:26
Step-by-step explanation:
let the number of pages in front of her be 'n'
and we know that the sum of n consecutive numbers is ; n(n+1)/2
so putting on the formula above ,we get
351=n(n+1)/2
702=n²+n
0=n²+n-702
or we can say that
-n²-n+702=0
or
n²+n-702=0
n²+27n-26n-702=0
n(n+27)-26(n+27)=0
(n-26) (n+27)=0
so here we get two values of n first 26and second -27
But n is a number of pages so can't be in negative value so n is 26
hope it helped you!
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