C-13-Q142mediumsingle_mcq

$1 + 3 + 5 + 7 + \cdots + 125$ equals $169 + 171 + 173 + \cdots + 209$ — both equal —

a $3969$
b $4000$
c $3025$
d $4225$

ব্যাখ্যা

The series $1+3+\cdots+125$ has $63$ odd terms, and the sum of the first $n$ odd numbers is $n^2$ , so it equals $63^2 = 3969$ . The second series likewise sums to the same value.

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1+3+5+7+⋯+1251 + 3 + 5 + 7 + \cdots + 1251+3+5+7+⋯+125 equals 169+171+173+⋯+209169 + 171 + 173 + \cdots + 209169+171+173+⋯+209 — both equal —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

1+3+5+7+⋯+1251 + 3 + 5 + 7 + \cdots + 1251+3+5+7+⋯+125 equals 169+171+173+⋯+209169 + 171 + 173 + \cdots + 209169+171+173+⋯+209 — both equal —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

$1 + 3 + 5 + 7 + \cdots + 125$ equals $169 + 171 + 173 + \cdots + 209$ — both equal —

$1 + 3 + 5 + 7 + \cdots + 125$ equals $169 + 171 + 173 + \cdots + 209$ — both equal —