SSC MTS Model Paper 4

© examsiri.com

Question : 48 of 150

Marks: +1, -0

If a + b + c = 2s, then find the value of (s − a)

^3

+ (s − b)

^3

+ 3(s − a) (s − b)c

2c $^2$
c $^2$
c $^3$
c

Solution:

Let a = b = c = 2, then 2s = 6 ⇒ s = 3

∴ ( s - a ) ^ { 3 } + ( s - b ) ^ { 3 } + 3 ( s - a ) ( s - b ) c

= ( 3 - 2 ) ^ { 3 } + ( 3 - 2 ) ^ { 3 } + 3 ( 3 - 2 ) ( 3 - 2 )× 2

= 1 + 1 + 3 × 2 = 8 = c

^3

© examsiri.com

Go to Question:

Prev Question

Next Question