if √0.5*b= 0.25√a then a:b ? 1⃣ 1:8 2⃣ 8:1 3⃣ 1:9 4⃣9:1
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Answer
Correct option is
A
8
7
a
2
+b
2
−2ab−c
2
a
2
−b
2
−c
2
−2bc
=
(a
2
+b
2
−2ab)−c
2
a
2
−(b
2
+c
2
+2bc)
=
(a−b)
2
−c
2
a
2
−(b+c)
2
=
(a−b+c)(a−b−c)
(a+b+c)(a−b−c)
=
a−b+c
a+b+c
=
0.25+0.05+0.5
0.25−0.05+0.5
=
0.8
0.7
=
8
7
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