Question

hello........

plz. give correct ans in detail step by step.​

Answer 1

Answer:

OPTION A

Step-by-step explanation:

Given :

1/2 log a = 1/3 log b = 1/5 log c

Let us take an extra variable say k so that :-

1/2 log a = 1/3 log b = 1/5 log c = log k

1/2 log a = log k

⇒ log √a = log k

Taking anti-log both sides :

⇒ √a = k

⇒ a = k²

1/3 log b = log k

⇒ log b^(1/3) = log k

Taking ant-log both sides :

⇒ b^(1/3) = k

⇒ b = k³

1/5 log c = log k

⇒ log c^(1/5) = log k

Take anti-log both sides :-

⇒ c^(1/5) = k

⇒ c = k⁵

Now finding the value :-

a⁴ - bc

⇒ (k²)⁴ - k³.k⁵

⇒ k⁸ - k⁸

⇒  0

The value of the expression will be 0 .

Answer 2

Answer: zero

Step-by-step explanation: see attachement