ช่วยหน่อยค่ะ

1. How many ways can a committee of four be chosen from a group of thirty people? 2. How many ways can four singers be chosen from a group of twenty singers? 3. How many ways can a committee of three be chosen from a group of sixteen girls and fifteen boys if there must be exactly one girl and two boys on the committee? 4. How many ways can a student council be chosen from a class of thirty if there is one president and three council members? 5. How many different tickets are possible for the Lotto 6/49? (a ticket consists of six numbers from 1 to 49 without any repeats) 6. How many ways can a committee of five be chosen from a class of ten boys and eighteen girls if Ted and Thelma must be on the council? 3. How many different five card hands are possible? & How many different five card hands are possible with exactly three aces and two other cards? 9. How many different two card hands are possible with both cards being face cards? lo. How many different two card hands are possible with both cards being red cards? แ(. How many different two card hands are possible with both cards being black aces? เ2- How many different five card hands are possible with exactly four Kings and one other face card?

diff แล้วได้แบบไหน

7. y = x(x +2)(x +x+5)

ความชันเป็นลบได้มั้ย

พี่ไคะการที่เราจะเรียนแคล เราต้องแม่นเรื่องไหนบ้างคะ

อยากรู้ว่าทำไม x ยกกำลัง-1/2 แล้วพอเรา diff แล้วทำไม x ยกกำลังมันถึงเหลือ-3/2 คะ

ช่วยคิดหน่อยนะค่ะ เราคิดมาได้ถึงแค่นี้ละก้ไปต่อไม่ถูก

ข้อนี้diffแล้วได้เท่าไรคะ ขอดูวิธีทำด้วยน้าา ขอบคุณล่วงหน้าค่าา ขอให้เจริญๆยิ่งๆขึ้นไป55