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solve for x; if


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

4 years ago

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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

4 years ago

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(a+b)^2
 
 
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HARINATH 5 months ago
 
(a+b) 2 = a 2 +2ab+b 2
 
OUTPASS 5 months ago
 
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SHANMUKESHWAR 5 months ago
plz can u give me solution of q48 and q49
 
 
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Akshay 6 months ago
 
will be the series in question. n . cofficient of x 2n-2i (-1) j (1+x) i C n = ∑ n -1) 2 q48. Assume ((x+1) Expand (x+1) 2 in LHS and solve. ATB.
 
Akshay 6 months ago
 
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Akshay 6 months ago
rank of matrix ?
 
 
The number of non-zero rows in the row reduced form of a matrix is called the row-rank of the matrix.
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Vijay Mukati 6 months ago
 
the no. of non zero rows in a matrix is called as rank of a matrix ….it is determined by echelon form
 
kalyan 5 months ago
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Charchit Tailong 6 months ago
What does the following mean? Three planes can intersect coaxially , implies that system of equations in 3 variables having infinite solutions.
 
 
Hii Yes coaxial planes are parallel. Hence there will be infinite solutions to the system of equations. Best of Luck
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Sourabh Singh one year ago
if AB=A and BA=B then which is correct a) A^2=A b) B^2=B c)A=I d) B=I? chapter matrices
 
 
Both options (a) and (b) are correct .A 2 =A & B 2 =B.
 
Nikhil Upadhyay 5 months ago
 
Look options a) and b) are correct showing that options c and d are also correct.see below for explaination. A 2 =A--------->A.A=A------------->A=A -1 .A(taking one of the A to right side...
 
Nikhil Upadhyay 5 months ago
 
Nikhil Upadhyay but why C and D not correct??? if we multiply both side by A inverse.... we will get A=I. ???
 
rajnish kumar 5 months ago
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