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UPSC NDA I and II 2020 Math Solved Paper

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Question : 58

Total: 120

Let A=[

a	h	g
h	b	f
g	f	c

], then what is AB equal to?

[
ax+hy+gz
y
z
]
[
ax+hy+gz
hx+by+fz
z
]
[
ax+hy+gz
hx+by+fz
gx+fy+cz
]
[
ax+hy+gz hx+by+fz gx+fy+cz
]

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