Hard Math Class 12 Level 2

A=[[4,2],[0,4]]. What is the first row second column element of A^5?

A=[[4,2],[0,4]] है। A^5 में first row second column का element क्या होगा?

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Correct Answer

D. 2560

Explanation

Step 1: this is an upper triangular matrix with repeated diagonal a. Step 2: the off-diagonal element in A^n is n*a^(n-1)*b, hence 2560. Step 3: tip: for equal diagonal a, the upper term becomes n*a^(n-1)*b.

Step 1: यह upper triangular repeated-root matrix है। Step 2: formula A^n के off-diagonal element के लिए n*a^(n-1)*b है, इसलिए 2560। Step 3: tip: same diagonal a हो तो power में upper term n*a^(n-1)*b बनता है।

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