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secondary 3 | A Maths
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Shan Kuek
Shan Kuek

secondary 3 chevron_right A Maths chevron_right Singapore

Help me pleaseee :3

Date Posted: 4 years ago
Views: 232
J
J
4 years ago
Take ln on both sides,


ln (2/7)^x < ln 0.04

x ln(2/7) < ln 0.04

x > ln0.04/ln(2/7)


Notice the sign change. ln(2/7) is negative. So when we divide by ln(2/7), we have to switch the sign.

x > 2.56942127

Least integral value = 3

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Eric Nicholas K
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