Question

help me out with no. 18​

Answer 1

Step-by-step explanation:

2^x = 5^y = 10^z

x = z log 10

2

y = z log 10

5

1/x + 1/y = (1/z) (log 2 + log 5)

1/x + 1/y = (1/z) (log 10)

1/x + 1/y = (1/z)