Question 7
Indices and LogarithmsGiven that 1/82−3y = 2y+2, find y.
- A.⅕
- B.⅞
- C.1
- D.1⅕
Show the answer and explanation
Answer: C (1)
Explanation
1/82−3y = 2−3(2−3y) = 29y−6. Equate powers: 9y − 6 = y + 2, so 8y = 8 and y = 1.
Given that 1/82−3y = 2y+2, find y.
Answer: C (1)
1/82−3y = 2−3(2−3y) = 29y−6. Equate powers: 9y − 6 = y + 2, so 8y = 8 and y = 1.