જો $\dfrac{a}{b} = \dfrac{3}{5}$ હોય, તો $\dfrac{a+b}{a-b}$ ની કિંમત શોધો.
A$4$
B$-4$
C$\dfrac{8}{2}$
D$-2$
Answer & Solution
Correct answer: B. $-4$
યોગ-વિયોગના નિયમ મુજબ, જો $\dfrac{a}{b} = \dfrac{c}{d}$ હોય તો $\dfrac{a+b}{a-b} = \dfrac{c+d}{c-d}$.
$c = 3, d = 5$ મૂકતાં: $\dfrac{3+5}{3-5} = \dfrac{8}{-2} = -4$.
સામાન્ય ભૂલ ચિહ્નને અવગણીને વિકલ્પ C પસંદ કરવાની થાય છે
ધ્યાન આપો કે $a < b$ છે, જેથી છેદ ઋણ બને છે.
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Related questions
₹$5400$ is divided among A, B and C in the ratio $3 : 5 : 7$. How much does B receive?Find the compounded ratio of $(2 : 3)$, $(5 : 7)$ and $(4 : 9)$.Find the mean proportional between $16$ and $25$.Find the fourth proportional to $4$, $9$ and $12$.Which of the following is equivalent to the ratio $4 : 5$?