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प्रश्न
Given A = `[(-3, 6),(0, -9)]` and At is its transpose matrix. Find 2A + 3At
उत्तर
A = `[(-3, 6),(0, -9)]`
At = `[(-3, 0),(6, -9)]`
2A + 3At = `2[(-3, 6),(0, -9)] + 3[(-3, 0),(6, -9)]`
= `[(-6,12),(0, -18)] + [(-9, 0),(18, -27)]`
= `[(-6 - 9, 12 + 0),(0 + 18, -18 - 27)]`
= `[(-15, 12),(18, -45)]`
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