A−1 does not exist when ∣A∣=0. Expanding: ∣A∣=1(−6−2)+2(−3−λ)+3(2−2λ)=−8−6−2λ+6−6λ=−8−8λ. Setting to zero gives λ=−1.
If f(x)={π−2xkcosx,3,x=2πx=2π is continuous at x=2π, then k is :
Held on 30 May 2023 · Verified 13 Jul 2026.
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