Question

Find tis please. i need the answr fast

Answer 1

Please find attached photograph for your answer.

Answer 2

We have:

`(3^(a+b) )/(3^(a-b) )=81=3^(4) \\\\=> 3^(a+b)=3^(4).3^(a-b) \\\\<=> 3^(a+b)=3^(a-b+4)\\\\=> a + b = a-b+4\\\\<=> 2b=4\\\\<=>b=2`

we also have:

`(2^(2a+b) )/(2^(2b-a) )=128=2^(7)\\\\<=>2^(2a+b)=2^(7).2^(2b-a)\\\\<=>2^(2a+b)=2^(2b-a+7)\\\\=>2a+b=2b-a+7\\\\<=>3a=b+7\\\\\\`

with b = 2 => 3a = 9 => a = 3

with a = 3; b = 2 => a + b = 5

Explanation: