$11^a=1331$ va $7^b=343$ bo'lsa, $a+b$ ning qiymatini toping.
- A. 6
- B. 4
- C. -4
- D. 3
Daraja va uning xossalari, darajali ifodalar bo‘yicha savol
Javob va yechimni ko‘rish
Javob: 6
Berilgan tenglamalardan $11^{a}=1331$ ni ko‘rib chiqamiz. $1331$ soni $11$ ning qaysi darajasi ekanligini aniqlasak, $11^{3}=1331$ bo‘lgani sababli $a=3$.
Keyin $7^{b}=343$ tenglamasini tekshiramiz. $343$ soni $7$ ning darajasi bo‘lib, $7^{3}=343$ ga teng, shuning uchun $b=3$.
Endi $a+b$ ni hisoblaymiz: $a+b=3+3=6$.
Demak, to‘g‘ri javob $6$, ya’ni variant **A**.
Mavzuni mustahkamlang
Bu savol Daraja va uning xossalari, darajali ifodalar mavzusiga tegishli. Ta’riflar, formulalar va misollarni mavzu sahifasida ko‘ring.
Mavzuni o‘rganish