Question

Solve x,when log0.4 x=4

Answer 1

Step-by-step explanation:

x=10

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Answer 2

Step-by-step explanation:

Answer

log0.4(x+5x−1) is defined for log0.4(x+5x−1)>0

log0.4(x+5x−1) is defined for

x+5x−1>0 and x+5=0

⇒x∈(−∞,−5)∩(1,∞) and x=−5

⇒x∈(1,∞)