A) 1
B) 5
C) 2
D) 7
Correct Answer: A
Solution :
(a): \[\sqrt{1+\sqrt{1-\frac{2176}{2401}}}=\sqrt{1+\sqrt{\frac{225}{2401}}}\] \[=1+\sqrt{\frac{15}{45}}=\sqrt{\frac{64}{49}}=\frac{8}{7}\] \[\therefore \frac{8}{7}=1+\frac{y}{7}\Rightarrow y=1\]You need to login to perform this action.
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