Question

If a = 2+4 102 − 2105, = 4103 = 10 − 105, find the value of m if a + b = 2c

Answer 1

Answer:

Correct option is

C

1

a

2

+b

2

+c

2

=2(a+2b−2c)−9

a

2

−2a+b

2

−4b+c

2

+4c+9=0

a

2

−2(a)(1)+(1)

2

+b

2

−2(b)(2)+(2)

2

+c

2

+2(c)(2)+(2)

2

=0

(a−1)

2

+(b−2)

2

+(c+2)

2

=0

⟹a=1,b=2,c=−2

a+b+c=1+2−2=1