Question

pls do this fast......... plsszz​

Answer 1

Answer:

a) x=1

b) x=0

Step-by-step explanation:

a)

(-5)^(x+1) * (-5)^5 = (-5)^7

we know that x^y * x^z = x^(y+z)

so,

(-5)^(x+1+5) = (-5)^7 => (-5)^(x+6) = (-5)^7

Now, equate the powers, we get

x+6 = 7

x=1

b)

(2^(-1) + 4^(-1) + 6^(-1) + 8^(-1))^x =1

we know that x^(-1) = 1/x

so,

(1/2 + 1/4 + 1/6 + 1/8)^x = 1

((12+6+4+3)/24)^x) = 1

(25/24)^x = 1

the possibility of x is 0

therefore x=0