Proving question, pattern and inequalities Hi my math tutor gave me this problem to do over the wee

Yahir Tucker

Yahir Tucker

Answered question

2022-06-28

Proving question, pattern and inequalities
Hi my math tutor gave me this problem to do over the week: prove 1/1^2+1/2^2+1/3^2...1/1000^2 <2
I've managed to almost complete the question, but I think I'm missing something or made a mistake.
My attempt at the question: 1/1000^2 < 1/999*1000 1/2^2+1/3^2+...1/1000^2<1/1*2+1/2*3+...1/999*1000 1/1*2+1/2*3+...1/999*1000= (1-1/2)+(1/2-1/3)+(1/3-1/4)...+1/999-1/1000 (we can cancel out each fraction except for 1-1/1000)
Therefore, 1/1*2+1/2*3+...1/999*1000=1-1/1000 1/2^2+1/3^2+...1/1000^2<1-1000 1/1^2+1/2^2+1/3^2...1/1000^2<2-1000
As you can see, I'm stuck please help D;

Answer & Explanation

Reagan Madden

Reagan Madden

Beginner2022-06-29Added 15 answers

1 1 2 + 1 2 2 + 1 3 2 + . . . + 1 1000 2 <
< 1 1 2 + 1 1 2 + 1 2 3 + . . . + 1 999 1000 =
= 1 + 1 1 1 2 + 1 2 1 3 + . . . + 1 999 1 1000 = 1 + 1 1 1000 < 2
Lydia Carey

Lydia Carey

Beginner2022-06-30Added 9 answers

By Riemann Sums:
1 1 2 + 1 2 2 + + 1 1000 2 = 1 + ( 1 2 2 + + 1 1000 2 ) 1 + 1 1000 d x x 2 = 1 + 999 1000 < 2

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