Question

sabendo que log 2= a e log 3=10, calcule log 9^20

Answer 1

Sabendo que log 2= a e log 3=10, calcule log 9^20

Se for log 9^20
log 9^20 
=20 * log 9 
=20 *log 3²
 =20 * 2 * log 3
=40*10
=400

Se for log 9 *20 
=log 9 + log 2*10
=log 3² + log 2 + log 10
=2*log 3 + log 2 + log 10
= 2 * 10+ a +1 =21+a