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3x+13x=4863^{x+1}-3^{x}=486ആയാൽ x ന്റെ വില കണ്ടെത്തുക 

A7

B5

C6

D4

Answer:

B. 5

Read Explanation:

3x+13x=4863^{x+1}-3^x=486
3x(31)=4863^x(3-1)=486

a(x+y)=ax×aya^{(x+y)}=a^x\times{a^y}
3x×2=4863^x\times2=486
3x=486/23^x=486/2
3x=2433^x=243
3x=353^x=3^5
x=5x=5


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