59. solve this question
Attachments:
Answers
Answered by
1
see image for the solution
Attachments:
Answered by
1
7^8.9 ÷ ( 343 )^1.7 × ( 49 )^4.8
= ( 7 )^8.9 ÷ ( 7^3 )^1.7 × ( 7^2 )^4.8
using ( a^m )^n = a^mn
= ( 7 )^ 8.9 ÷ ( 7 )^5.1 × ( 7 )^9.6
using a^m ÷ a^n = a^m - n and a^m × a^n = a^m + n
= ( 7 )^8.9 - 5.1 + 9.6
= ( 7 )^3.8 + 9.6
= ( 7 )^13.4
so choose option b
= ( 7 )^8.9 ÷ ( 7^3 )^1.7 × ( 7^2 )^4.8
using ( a^m )^n = a^mn
= ( 7 )^ 8.9 ÷ ( 7 )^5.1 × ( 7 )^9.6
using a^m ÷ a^n = a^m - n and a^m × a^n = a^m + n
= ( 7 )^8.9 - 5.1 + 9.6
= ( 7 )^3.8 + 9.6
= ( 7 )^13.4
so choose option b
Similar questions