Question No. 19 The first term in the maclaurians expansion of f(x,y) = ex+y is Answer
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Answer:
f(x, y) = f(x + y,0) = -0 Σ* Σ=o 4 (%)*yn-k n=0k-0 (x+y)" n!
From this, we can read off the x y term coefficient as (i+j)! (¹¹) = (by letting (i, j) = (k, nk) and solving for k, n in terms of i, j).
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Answer:
cosh⁴x - sinh⁴x = cosh(2x).
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