Question

x +y into power 28 what will be it's value
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Answer 1

Step-by-step explanation:

x+y=28⟶(1)

∴y=28−x

∴x

3

y

4

⟹x

3

(28−x)

4

dx

d

[x

3

(28−x)

4

]=0

3x

2

(28−x)

4

−4(28−x)

3

x

3

=0

3(28−x)=4x

∴x=12

∴y=(28−12)=16