If 3 x 2^4+5 + 2^10 = 2 12 , then find the value of x
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Answers
Answered by
1
Answer:
x=2+2
2/3
+2
1/3
⇒(x−2)=2
2/3
+2
1/3
⇒(x−2)=2
2/3
+2
1/3
On cubing both sides, we get
(x−2)
3
=2
2
+2+3⋅2
2/3
⋅2
1/3
(2
2/3
+2
1/3
)
⇒x
3
−6x
2
+12x−8=4+2+3×2×(x−2)
⇒x
3
−6x
2
+6x=2.
Answered by
1
Answer:
x[
2
3
]+y[
−1
1
]=[
10
5
]
⇒[
2x
3x
]+[
−y
y
]=[
10
5
]
⇒[
2x−y
3x+y
]=[
10
5
]
Comparing the corresponding elements of these two matrices,
we get 2x−y=10 and 3x+y=5
Solving these we get,
x=3 and y=−4
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