Have any questions?
[email protected]
English
Vietnamese
French
Spanish
Korean
Japanese
Thai
Chinese
Indonesian
Login
Signup
Contact
Login
Home
(a/b)^x−2=(b/a)^x−7. What is the value of x ?
Question 1:
(a/b)^x−2=(b/a)^x−7. What is the value of x ?
A.
1.5
B.
4.5
Feedback
(a/b)^x−2=(b/a)^x−7
(a/b)^x−2=(a/b)^-x−7
⇒x−2=−(x−7)
⇒x−2=−(x−7)
⇒x−2=−x+7
2x=9
x=9/2=4.5
C.
7.5
D.
9.5
These questions are from this test. Would you like to take a practice test?
Practice Surds and Indices Online Test 4 | Englishfreetest.com
20 minutes
10 questions
Do test
Some questions from the same exam
if 5^a = 3152 then the value of 5^(a - 3) is
If m and n are whole numbers such that
m^n =121, the value of (m−1)^n+1 is
The value of 5^1/4 x (125)^0.25 is
(a/b)^x−2=(b/a)^x−7. What is the value of x ?
If 2x=3√32, then x is equal to
x=3+2–√2, then the value of (√x−√1/√x)
Find the value of
(10)^150÷(10)^146
If a and b are whole numbers such that a^b = 121, then find the value of (a – 1)^b + 1
Simplify 7^3x –2 = 2401 find value of x
Simplify (27/1331)^2/3 x (121/9)^1/2
Some other questions you may be interested in
The tallest bird in our country … two meters tall.
The medical doctor was worried because the patient appeared listless and … .
… the best car to buy is a Citroen.
Even people who have little technical background have … to understand computer language.
A bat will often spend the daylight hours … upside down.
This university’s programs … those of Stanford.