Question

If p(u) = u^6+ 5u^4 - 6u^3+ 2 and q(u) = 6u^5 + 4u^4 + 3u^3 + 1 then p(1) – q(-1) is :
(A) -6
(B) 2
(C) 6
(D) -2​

Answer 1

Answer:

C) is the correct option

Step-by-step explanation:

p(u) = u⁶ + 5u⁴ - 6u³ + 2

p(1) = (1)⁶ + 5(1)⁴ - 6(1)³ + 2

       = 1 + 5 - 6 + 2

       = 8 - 6

       = 2

q(u) = 6u⁵ + 4u⁴ + 3u³ + 1

q(-1) = 6(-1)⁵ + 4(-1)⁴ + 3(-1)³ + 1

       = -6 + 4 - 3 + 1

      = -9 + 5

     = -4

Now,

p(1) - q(-1)

= 2 -(-4)

= 2 + 4

= 6

Answer 2

Answer:

Step-by-step explanation:

p(u) = u⁶ + 5u⁴ - 6u³ + 2

p(1) = (1)⁶ + 5(1)⁴ - 6(1)³ + 2

      = 1 + 5 - 6 + 2

      = 8 - 6

      = 2

q(u) = 6u⁵ + 4u⁴ + 3u³ + 1

q(-1) = 6(-1)⁵ + 4(-1)⁴ + 3(-1)³ + 1

      = -6 + 4 - 3 + 1

     = -9 + 5

    = -4

Now,

p(1) - q(-1)

= 2 -(-4)

= 2 + 4

= 6