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DEEPIKA CHOURASIA

· started a discussion

· 1 Months ago

deepika chourasia (Question: 252411.0 )

sir your explanation is not clear plz explain clearly

Question:
Find the unit place of \(\cfrac{12^{55}}{3^{11}}+\cfrac{8^{48}}{16^{18}}\)  is — 
Options:
A) 1
B) 0
C) 7
D) 9
Solution:

Ans: (b) 


mayank

· commented

· 1 Months ago

cyclicity of every no is 4 use this method

Vaibhav Yadav

· commented

· 1 Months ago

12^55= 4^55x3^55/ 3^11 = 4^55x3^44 = 4x1=4 similary 6 and 4+6=10 so zero
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