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- (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
(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
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