Challenger App

No.1 PSC Learning App

1M+ Downloads

3x+y 3^{x+y} = 2187 ഉം  3xy 3^{x-y}  = 243 ഉം ആണെങ്കിൽ X ന്റെ മൂല്യം എത്ര ? 

A4

B-1

C6

D7

Answer:

C. 6

Read Explanation:

3x+y 3^{x+y} = 2187  3xy 3^{x-y}  = 243

35=2433^5 = 243

37=2187 3^7=2187

xy=5 x - y = 5

x+y=7x + y = 7

2x=12 2x = 12

x=12/2=6x =12/2= 6


Related Questions:

(0.04)(1.5)(0.04)^{(-1.5)}എത്ര?

(53×5×5)÷57/2=5a+3(5^3 \times 5 \times \sqrt{5}) \div 5^{-7/2} = 5^{a+3} ആയാൽ aa എത്ര?

if2m=16then find \text{if}\,\,2^m =16\, \text{then find}\,

3m1 3^{m-1}

(-1)5 +(-1)101 +(-1)200 + (-1)702 = ?

(1)2+(1)3+(1)4+(1)5(-1)^{2}+(-1)^{3} + (-1)^{4} + (-1)^{5} = ____