Question

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) ​

Answer 1

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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

hope it will help u