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الدالة: h(t)= t- t -->@font-face{font-fami... | حل وشرح

الدالة: تمثل الارتفاع بالأقدام بعد t ثانية لكرة قذفت رأسيا إلى أعلى. أوجد معادلة السرعة المتجهة اللحظية للكرة عند أي زمن .