দেখাও যে, a ও b-এর সমস্ত মানে
d^2x÷dt^2 + 2k ×dx÷dt + (k^2 +n^2)x = 0 সমীকরণ সর্বদাই
x = e^-kt(a cos nt + b sin nt) সমাধান দ্বারা সিদ্ধ হয়
।
dt2
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please write it in hindi or english
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