Evaluate the expression.?

0 ⤊

Evaluate the expression.?

a. log5(125)
b. log49(7)
c. log9(sqrt3))

2006-12-03 05:36:43 · 3 answers · asked by Katy J 1 in Science & Mathematics ➔ Mathematics

3 answers

Yuk

2006-12-03 05:41:21 · answer #1 · answered by GiGi 4 · 0⤊ 0⤋

a. log5(125) = log5(5^3) = 3log5(5) = 3

b. log49(7) = log7^2(7) = (log 7)/(2 log 7) = 1/2

c. log9(sqrt3) = log3^2(3^1/2) = (1/2) / 2 = 1/4

2006-12-03 05:43:55 · answer #2 · answered by alia_vahed 3 · 0⤊ 0⤋

its easier if you rewrite to exponential form

a. 5^x=125, since 5^3 is 125, the answer is 3.
b. 49^x=7, since 7 is sqrt(49), the answer is 1/2
c. 9^x=sqrt(3). since 9 is (sqrt(3))^4, 9^(1/4)=sqrt(3), the answer is 1/4

2006-12-03 05:41:44 · answer #3 · answered by abc123zyx 2 · 0⤊ 0⤋