If 10 to the power of p>

=(10 to the power of X)?×(10 to the power of Y)?

=5?×3?

=25×27

=675

Assume that the modulus of vector a is (1, 2), the modulus of vector b is (-2, n), and the angle between a and b is 45°. Find b Module

(1) |a|=√(1 4)=√5, |b|=√(4 n^2), a*b=1*(-2) 2*n =2n-2,

cos45°=a*b/(|a|*|b|),

So (2n-2)/[√5*√(4 n^2)]=√2/2,

The solution is n=6,

so b=(-2, 6) My htcg18 is 2.3 and I want to upgrade to 4.03 Yes, is the current official 4.03 stable?

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