যদি $\dfrac{a}{b} = \dfrac{3}{5}$ হয়, তেন্তে $\dfrac{a+b}{a-b}$-ৰ মান নিৰ্ণয় কৰক।
A$4$
B$-4$
C$\dfrac{8}{2}$
D$-2$
Answer & Solution
Correct answer: B. $-4$
যোগ-ভাগ প্ৰক্ৰিয়া অনুসৰি, যদি $\dfrac{a}{b} = \dfrac{c}{d}$ হয়, তেন্তে $\dfrac{a+b}{a-b} = \dfrac{c+d}{c-d}$।
$c = 3, d = 5$ বহুৱাই পোৱা যায়: $\dfrac{3+5}{3-5} = \dfrac{8}{-2} = -4$।
সাধাৰণতে হোৱা এটা ভুল হ'ল চিনটো বাদ দি Option C বাছি লোৱা
মন কৰিব যে $a < b$, যাৰ ফলত হৰটো ঋণাত্মক হ'ব।
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