Let g(t) be a differentiable function such that g(1)=2, g(3)=4; g'(1)=1, g'(3)=1. Let f+ df denote the differential (linear) approximation of f(1.1,2.8), where f(x.y)=x?g(x²y). Let h(x,y)=3y²+6xy+2x?. Choose the TWO correct statements below. f+df=3.7 f+df =4.9 (1,1) and (1, – 1) are local extrema of h(x,y). f+df=4.5 h(x.y) has a local minimum at (1, – 1). f+df=5.2 (1,0) and (1, – 1) are local extrema of h(x,y). h(x,y) has no local minima.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Let g(t) be a differentiable function such that
g(1)=2, g(3)=4; g'(1)=1, g'(3)=1.
Let f+ df denote the differential (linear) approximation of f(1.1,2.8), where f(x ,y)=x?g(x3y).
Let h(x,y)=3y²+6xy+2x?.
Choose the TWO correct statements below.
f+df =3.7
f+df = 4.9
(1,1) and (1, – 1) are local extrema of h(x,y).
f+df =4.5
h(x,y) has a local minimum at (1,-1).
f+df =5.2
(1,0) and (1, – 1) are local extrema of h(x,y).
h(x,y) has no local minima.
Transcribed Image Text:Let g(t) be a differentiable function such that g(1)=2, g(3)=4; g'(1)=1, g'(3)=1. Let f+ df denote the differential (linear) approximation of f(1.1,2.8), where f(x ,y)=x?g(x3y). Let h(x,y)=3y²+6xy+2x?. Choose the TWO correct statements below. f+df =3.7 f+df = 4.9 (1,1) and (1, – 1) are local extrema of h(x,y). f+df =4.5 h(x,y) has a local minimum at (1,-1). f+df =5.2 (1,0) and (1, – 1) are local extrema of h(x,y). h(x,y) has no local minima.
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