Question

Let $f:→R→(0,∞)$ be increasing function such that $Lt_{x→∞}\frac {f(7x)}{f(x)}=1$, then $Lt_{x→∞}[\frac {f(5x)}{f(x)}-1]$ is equal to

• A. 0
• B. 4
• C. 1
• D. $\frac 45$

Answer 1

Answer: (A)

0

Answer 2

The correct option is (A): 0.