solve for x; if

log 7(x3+7)-log7(x+3)=2

3 years ago


Answers : (1)


log 7(x3+7)-log7(x+3)=2

log(x3+7)/log7 - logx+3/log7 = 2

logx3+7 - logx+3 = 2log7

logx3+7/x+3 = log49

x3+7 = 49x + 49*3

x3 -49x - 20*7 = 0

x3 - 49x - 140 = 0

now solve for x

3 years ago

Post Your Answer

More Questions On Algebra

Ask Experts

Have any Question? Ask Experts
Post Question
Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
Hello student, Please find my response to your question below Iam not able to interpret your query.I think your question is not complete.please specify the value of x and recheck the...
Factorise a 3 – 27b 3 – 7ab 2 + 21a 2 b
Divide by b 3 and replace (a/b) by x ; we get, x 3 + 21x 2 _ 7x –27 = 0; Notice if x = -1 then it reduces to 0; .: (x+1) is a factor ; Now divide the equation by (x+1) we get, x 2 + 20x – 27...
MANU MITRAAN one month ago
x^2+y^2=1 then min value of (4-y)/(7-x)
Hello student, Please find the answer to your question below Givenx^2+y^2=1 so y=sqrt(1-x 2 ).............(1) Asked to find outmin value of (4-y)/(7-x) substituting (1) in(4-y)/(7-x) we get...
Integrate ∫((tanx) 1/2 +(cotx) 1/2 ) dx
Ans: Hello Student, Please find answer to your question below
Jitender Singh 2 months ago
If the distance between circumcentre and orthocentre of triangle whose vertices are (1,5) (2,3) (4,4) is k/√10 then sum of abscissa of points which are k distance away from the point (3,2)...
A (1,5) B (2,3) C (4,4) AB= √5 units BC=√5 units AC= √10 units Hence given triangle is right angled triangle ( AB2 + BC2 = AC2) at B Orthocenter is B only CIrcumcenter for...
Harsh Patodia one month ago
can u explain vectors
Scalar product: The scalar product or dot product of two vectors A and B , denoted as A.B is defined as A.B= AB cos θ where, θ is the angle between the two vectors. Since A, B...
yours katarnak Suresh one year ago
vectors: A Quantity having both magnitude and direction and obeys laws of vector addition is called a vector. Examples:Displacement,Velocity,Acceleration etc., Product of vectors:1)cross...
BAYANA SAGAR one year ago
those quantities which requires magnitude and direction both for their representation and obeys parallelogram law of vector addition are called vectors.these are tensors of rank 1.
jaideep sangwan 2 years ago
View all Questions »