Try to solve the following questions:
(1)2a - 2/a + 1 = 0, calculate the value of a^3 - 1/a^3 +2
(ans):3/8.
(2) if m+n = 5 and mn=6, find out the value of. (m^2 + n^2)(m^3 + n^3).
(ans:455)
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10th
Maths
Pair of Linear Equations in Two Variables
Algebraic Solution of a Pair of Linear Equations
Determine the value of m &...
MATHS
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Asked on January 17, 2020 by
Aaroohi Nagar
Determine the value of m and n so that the pair of linear equations
(2m+1)x+3y=5
3x+(n−1)y=2
have infinite number of solutions.
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ANSWER
(2m+1)x+3y−5=0
3x+(n−1)y−2
condition for a pair of linear equations to have infinite number of solutions
a
2
a
1
=
b
2
b
1
=
c
2
c
1
3
2m+1
=
n−1
3
=
−2
−5
3
2m+1
=
2
5
4m+2=15
4m=13
m=
4
13
n−1
3
=
2
5
5n−5=6
5n=11
n=
5
11
my friend
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